diff --git a/Marco.Pms.DataAccess/Data/ApplicationDbContext.cs b/Marco.Pms.DataAccess/Data/ApplicationDbContext.cs
index 5d2ab7f..946774c 100644
--- a/Marco.Pms.DataAccess/Data/ApplicationDbContext.cs
+++ b/Marco.Pms.DataAccess/Data/ApplicationDbContext.cs
@@ -34,46 +34,149 @@ namespace Marco.Pms.DataAccess.Data
             _httpContextAccessor = httpContextAccessor;
 
         }
-
+        #region ======================================================= System Masters =======================================================
         public DbSet<RefreshToken> RefreshTokens { get; set; }
         public DbSet<TenantStatus> TenantStatus { get; set; }
         public DbSet<SubscriptionStatus> SubscriptionStatus { get; set; }
+        public DbSet<Module> Modules { get; set; }
+        public DbSet<Feature> Features { get; set; }
+        public DbSet<FeaturePermission> FeaturePermissions { get; set; }
+        public DbSet<CurrencyMaster> CurrencyMaster { get; set; }
+        public DbSet<Industry> Industries { get; set; }
+        public DbSet<Inquiries> Inquiries { get; set; }
+        public DbSet<StatusUpdateLog> StatusUpdateLogs { get; set; }
+        public DbSet<PaymentDetail> PaymentDetails { get; set; }
+
+        #endregion
+
+        #region ======================================================= Tenant Masters =======================================================
+        public DbSet<Document> Documents { get; set; }
+        public DbSet<MailingList> MailingList { get; set; }
+        public DbSet<MailDetails> MailDetails { get; set; }
+        public DbSet<MailLog> MailLogs { get; set; }
+        public DbSet<OTPDetails> OTPDetails { get; set; }
+        public DbSet<MPINDetails> MPINDetails { get; set; }
+        public DbSet<FCMTokenMapping> FCMTokenMappings { get; set; }
+
+        #endregion
+
+        #region ======================================================= Tenant =======================================================
         public DbSet<Tenant> Tenants { get; set; }
         public DbSet<SubscriptionPlan> SubscriptionPlans { get; set; }
         public DbSet<SubscriptionPlanDetails> SubscriptionPlanDetails { get; set; }
         public DbSet<TenantSubscriptions> TenantSubscriptions { get; set; }
+        public DbSet<TenantEnquire> TenantEnquires { get; set; }
+
+        #endregion
+
+        #region ======================================================= Employees =======================================================
+
+        #region ======================================================= Masters =======================================================
+        public DbSet<JobRole> JobRoles { get; set; }
+        public DbSet<ApplicationRole> ApplicationRoles { get; set; }
+        public DbSet<RolePermissionMappings> RolePermissionMappings { get; set; }
+        #endregion
+
         public DbSet<ApplicationUser> ApplicationUsers { get; set; }
+        public DbSet<Employee> Employees { get; set; }
+        public DbSet<EmployeeRoleMapping> EmployeeRoleMappings { get; set; }
+        #endregion
+
+        #region ======================================================= Project =======================================================
+
+        #region ======================================================= Masters =======================================================
         public DbSet<ServiceMaster> ServiceMasters { get; set; }
         public DbSet<ActivityGroupMaster> ActivityGroupMasters { get; set; }
         public DbSet<ActivityMaster> ActivityMasters { get; set; }
+        public DbSet<StatusMaster> StatusMasters { get; set; }
+        public DbSet<ActivityCheckList> ActivityCheckLists { get; set; }
+        public DbSet<CheckListMappings> CheckListMappings { get; set; }
+        public DbSet<WorkCategoryMaster> WorkCategoryMasters { get; set; }
+        public DbSet<WorkStatusMaster> WorkStatusMasters { get; set; }
+        public DbSet<GlobalServiceMaster> GlobalServiceMasters { get; set; }
+        public DbSet<GlobalActivityGroupMaster> GlobalActivityGroupMasters { get; set; }
+        public DbSet<GlobalActivityMaster> GlobalActivityMasters { get; set; }
+        #endregion
+
         public DbSet<Project> Projects { get; set; }
         public DbSet<ProjectAllocation> ProjectAllocations { get; set; }
-        public DbSet<StatusMaster> StatusMasters { get; set; }
         public DbSet<Building> Buildings { get; set; }
         public DbSet<Floor> Floor { get; set; }
         public DbSet<WorkArea> WorkAreas { get; set; }
         public DbSet<WorkItem> WorkItems { get; set; }
         public DbSet<WorkShift> WorkShifts { get; set; }
+        public DbSet<ProjectLevelPermissionMapping> ProjectLevelPermissionMappings { get; set; }
+        public DbSet<ProjectServiceMapping> ProjectServiceMappings { get; set; }
+
+        #endregion
+
+        #region ======================================================= Task Allocation =======================================================
         public DbSet<TaskAllocation> TaskAllocations { get; set; }
         public DbSet<TaskComment> TaskComments { get; set; }
         public DbSet<TaskMembers> TaskMembers { get; set; }
         public DbSet<TaskAttachment> TaskAttachments { get; set; }
+        #endregion
+
+        #region ======================================================= Attendace =======================================================
         public DbSet<Attendance> Attendes { get; set; }
         public DbSet<AttendanceLog> AttendanceLogs { get; set; }
-        public DbSet<Employee> Employees { get; set; }
-        public DbSet<EmployeeRoleMapping> EmployeeRoleMappings { get; set; }
-        public DbSet<Module> Modules { get; set; }
-        public DbSet<Feature> Features { get; set; }
-        public DbSet<FeaturePermission> FeaturePermissions { get; set; }
-        public DbSet<ProjectLevelPermissionMapping> ProjectLevelPermissionMappings { get; set; }
-        public DbSet<CurrencyMaster> CurrencyMaster { get; set; }
-        public DbSet<ApplicationRole> ApplicationRoles { get; set; }
-        public DbSet<JobRole> JobRoles { get; set; }
-        public DbSet<RolePermissionMappings> RolePermissionMappings { get; set; }
-        public DbSet<Industry> Industries { get; set; }
-        public DbSet<ActivityCheckList> ActivityCheckLists { get; set; }
-        public DbSet<CheckListMappings> CheckListMappings { get; set; }
-        public DbSet<Inquiries> Inquiries { get; set; }
+        #endregion
+
+        #region ======================================================= Directory =======================================================
+
+        #region ======================================================= Masters =======================================================
+        public DbSet<Bucket> Buckets { get; set; }
+        public DbSet<ContactTagMaster> ContactTagMasters { get; set; }
+        public DbSet<ContactCategoryMaster> ContactCategoryMasters { get; set; }
+        #endregion
+
+        public DbSet<Contact> Contacts { get; set; }
+        public DbSet<ContactEmail> ContactsEmails { get; set; }
+        public DbSet<ContactPhone> ContactsPhones { get; set; }
+        public DbSet<ContactNote> ContactNotes { get; set; }
+        public DbSet<ContactTagMapping> ContactTagMappings { get; set; }
+        public DbSet<EmployeeBucketMapping> EmployeeBucketMappings { get; set; }
+        public DbSet<ContactBucketMapping> ContactBucketMappings { get; set; }
+        public DbSet<ContactProjectMapping> ContactProjectMappings { get; set; }
+        public DbSet<DirectoryUpdateLog> DirectoryUpdateLogs { get; set; }
+        #endregion
+
+        #region ======================================================= Finance =======================================================
+
+        #region ======================================================= Masters =======================================================
+        public DbSet<PaymentModeMatser> PaymentModeMatser { get; set; }
+        public DbSet<ExpensesStatusMaster> ExpensesStatusMaster { get; set; }
+        public DbSet<ExpensesTypeMaster> ExpensesTypeMaster { get; set; }
+        public DbSet<ExpenseCategoryMaster> ExpenseCategoryMasters { get; set; }
+        public DbSet<RecurringPaymentStatus> RecurringPaymentStatus { get; set; }
+
+        #endregion
+
+        #region ======================================================= Expenses =======================================================
+        public DbSet<Expenses> Expenses { get; set; }
+        public DbSet<ExpenseLog> ExpenseLogs { get; set; }
+        public DbSet<BillAttachments> BillAttachments { get; set; }
+        public DbSet<ExpensesReimburse> ExpensesReimburse { get; set; }
+        public DbSet<ExpensesReimburseMapping> ExpensesReimburseMapping { get; set; }
+        public DbSet<StatusPermissionMapping> StatusPermissionMapping { get; set; }
+        public DbSet<ExpensesStatusMapping> ExpensesStatusMapping { get; set; }
+
+        #endregion
+
+        #region ======================================================= Collection =======================================================
+        public DbSet<Invoice> Invoices { get; set; }
+        public DbSet<InvoiceComment> InvoiceComments { get; set; }
+        public DbSet<InvoiceAttachment> InvoiceAttachments { get; set; }
+        public DbSet<ReceivedInvoicePayment> ReceivedInvoicePayments { get; set; }
+        public DbSet<PaymentAdjustmentHead> PaymentAdjustmentHeads { get; set; }
+        #endregion
+        public DbSet<PaymentRequest> PaymentRequests { get; set; }
+        public DbSet<PaymentRequestAttachment> PaymentRequestAttachments { get; set; }
+        public DbSet<RecurringPayment> RecurringPayments { get; set; }
+        public DbSet<AdvancePaymentTransaction> AdvancePaymentTransactions { get; set; }
+        #endregion
+
+        #region ======================================================= Tickets =======================================================
         public DbSet<TicketForum> Tickets { get; set; }
         public DbSet<TicketAttachment> TicketAttachments { get; set; }
         public DbSet<TicketComment> TicketComments { get; set; }
@@ -81,57 +184,10 @@ namespace Marco.Pms.DataAccess.Data
         public DbSet<TicketTypeMaster> TicketTypeMasters { get; set; }
         public DbSet<TicketPriorityMaster> TicketPriorityMasters { get; set; }
         public DbSet<TicketTagMaster> TicketTagMasters { get; set; }
-        public DbSet<Document> Documents { get; set; }
         public DbSet<TicketTag> TicketTags { get; set; }
-        public DbSet<WorkCategoryMaster> WorkCategoryMasters { get; set; }
-        public DbSet<WorkStatusMaster> WorkStatusMasters { get; set; }
-        public DbSet<Contact> Contacts { get; set; }
-        public DbSet<ContactCategoryMaster> ContactCategoryMasters { get; set; }
-        public DbSet<ContactEmail> ContactsEmails { get; set; }
-        public DbSet<ContactPhone> ContactsPhones { get; set; }
-        public DbSet<ContactNote> ContactNotes { get; set; }
-        public DbSet<Bucket> Buckets { get; set; }
-        public DbSet<ContactTagMaster> ContactTagMasters { get; set; }
-        public DbSet<ContactTagMapping> ContactTagMappings { get; set; }
-        public DbSet<EmployeeBucketMapping> EmployeeBucketMappings { get; set; }
-        public DbSet<ContactBucketMapping> ContactBucketMappings { get; set; }
-        public DbSet<ContactProjectMapping> ContactProjectMappings { get; set; }
-        public DbSet<DirectoryUpdateLog> DirectoryUpdateLogs { get; set; }
-
-        public DbSet<MailingList> MailingList { get; set; }
-        public DbSet<MailDetails> MailDetails { get; set; }
-        public DbSet<MailLog> MailLogs { get; set; }
-        public DbSet<OTPDetails> OTPDetails { get; set; }
-        public DbSet<MPINDetails> MPINDetails { get; set; }
-
-        public DbSet<Expenses> Expenses { get; set; }
-        public DbSet<ExpenseLog> ExpenseLogs { get; set; }
-        public DbSet<ExpensesTypeMaster> ExpensesTypeMaster { get; set; }
-        public DbSet<ExpenseCategoryMaster> ExpenseCategoryMasters { get; set; }
-        public DbSet<PaymentModeMatser> PaymentModeMatser { get; set; }
-        public DbSet<ExpensesStatusMaster> ExpensesStatusMaster { get; set; }
-        public DbSet<BillAttachments> BillAttachments { get; set; }
-        public DbSet<ExpensesReimburse> ExpensesReimburse { get; set; }
-        public DbSet<ExpensesReimburseMapping> ExpensesReimburseMapping { get; set; }
-        public DbSet<StatusPermissionMapping> StatusPermissionMapping { get; set; }
-        public DbSet<ExpensesStatusMapping> ExpensesStatusMapping { get; set; }
-        public DbSet<PaymentRequest> PaymentRequests { get; set; }
-        public DbSet<PaymentRequestAttachment> PaymentRequestAttachments { get; set; }
-        public DbSet<RecurringPayment> RecurringPayments { get; set; }
-        public DbSet<AdvancePaymentTransaction> AdvancePaymentTransactions { get; set; }
-        public DbSet<RecurringPaymentStatus> RecurringPaymentStatus { get; set; }
-
-        public DbSet<StatusUpdateLog> StatusUpdateLogs { get; set; }
-
-        // Collection
-        public DbSet<Invoice> Invoices { get; set; }
-        public DbSet<InvoiceComment> InvoiceComments { get; set; }
-        public DbSet<InvoiceAttachment> InvoiceAttachments { get; set; }
-        public DbSet<ReceivedInvoicePayment> ReceivedInvoicePayments { get; set; }
-        public DbSet<PaymentAdjustmentHead> PaymentAdjustmentHeads { get; set; }
-
-        public DbSet<FCMTokenMapping> FCMTokenMappings { get; set; }
+        #endregion
 
+        #region ======================================================= Project and Employee Documents =======================================================
         public DbSet<EntityTypeMaster> EntityTypeMasters { get; set; }
         public DbSet<DocumentTypeMaster> DocumentTypeMasters { get; set; }
         public DbSet<DocumentCategoryMaster> DocumentCategoryMasters { get; set; }
@@ -139,20 +195,16 @@ namespace Marco.Pms.DataAccess.Data
         public DbSet<DocumentAttachment> DocumentAttachments { get; set; }
         public DbSet<AttachmentVersionMapping> AttachmentVersionMappings { get; set; }
         public DbSet<AttachmentTagMapping> AttachmentTagMappings { get; set; }
+        #endregion
 
-        public DbSet<GlobalServiceMaster> GlobalServiceMasters { get; set; }
-        public DbSet<GlobalActivityGroupMaster> GlobalActivityGroupMasters { get; set; }
-        public DbSet<GlobalActivityMaster> GlobalActivityMasters { get; set; }
-
+        #region ======================================================= Organizations =======================================================
         public DbSet<Organization> Organizations { get; set; }
         public DbSet<OrgTypeMaster> OrgTypeMasters { get; set; }
         public DbSet<TenantOrgMapping> TenantOrgMappings { get; set; }
         public DbSet<OrgServiceMapping> OrgServiceMappings { get; set; }
-        public DbSet<ProjectServiceMapping> ProjectServiceMappings { get; set; }
         public DbSet<ProjectOrgMapping> ProjectOrgMappings { get; set; }
+        #endregion
 
-        public DbSet<PaymentDetail> PaymentDetails { get; set; }
-        public DbSet<TenantEnquire> TenantEnquires { get; set; }
 
         protected override void OnModelCreating(ModelBuilder modelBuilder)
         {
diff --git a/Marco.Pms.Model/MongoDBModels/Expenses/ExpenseDetailsMongoDB.cs b/Marco.Pms.Model/MongoDBModels/Expenses/ExpenseDetailsMongoDB.cs
index 93b63ba..c1d3f6a 100644
--- a/Marco.Pms.Model/MongoDBModels/Expenses/ExpenseDetailsMongoDB.cs
+++ b/Marco.Pms.Model/MongoDBModels/Expenses/ExpenseDetailsMongoDB.cs
@@ -24,6 +24,7 @@ namespace Marco.Pms.Model.MongoDBModels.Expenses
         public CurrencyMaster? Currency { get; set; }
         public double? BaseAmount { get; set; }
         public double? TaxAmount { get; set; }
+        public double? TDSPercentage { get; set; }
         public string? PaymentRequestUID { get; set; }
         public string? ExpenseUId { get; set; }
         public ExpensesStatusMasterMongoDB Status { get; set; } = new ExpensesStatusMasterMongoDB();
diff --git a/Marco.Pms.Model/ViewModels/Expenses/ExpenseDetailsVM.cs b/Marco.Pms.Model/ViewModels/Expenses/ExpenseDetailsVM.cs
index c6c35f2..d15c8ea 100644
--- a/Marco.Pms.Model/ViewModels/Expenses/ExpenseDetailsVM.cs
+++ b/Marco.Pms.Model/ViewModels/Expenses/ExpenseDetailsVM.cs
@@ -21,6 +21,9 @@ namespace Marco.Pms.Model.ViewModels.Expenses
         public string SupplerName { get; set; } = string.Empty;
         public string? ExpenseUId { get; set; }
         public double Amount { get; set; }
+        public double? BaseAmount { get; set; }
+        public double? TaxAmount { get; set; }
+        public double? TDSPercentage { get; set; }
         public ExpensesStatusMasterVM? Status { get; set; }
         public List<ExpensesStatusMasterVM>? NextStatus { get; set; }
         public bool PreApproved { get; set; } = false;
diff --git a/Marco.Pms.Model/ViewModels/Expenses/PaymentRequestDetailsVM.cs b/Marco.Pms.Model/ViewModels/Expenses/PaymentRequestDetailsVM.cs
index cf994e5..06a5004 100644
--- a/Marco.Pms.Model/ViewModels/Expenses/PaymentRequestDetailsVM.cs
+++ b/Marco.Pms.Model/ViewModels/Expenses/PaymentRequestDetailsVM.cs
@@ -17,6 +17,7 @@ namespace Marco.Pms.Model.ViewModels.Expenses
         public double Amount { get; set; }
         public double? BaseAmount { get; set; }
         public double? TaxAmount { get; set; }
+        public double? TDSPercentage { get; set; }
         public DateTime DueDate { get; set; }
         public BasicProjectVM? Project { get; set; }
         public BasicRecurringPaymentVM? RecurringPayment { get; set; }
diff --git a/Marco.Pms.Services/Service/ExpensesService.cs b/Marco.Pms.Services/Service/ExpensesService.cs
index f0f254f..2149931 100644
--- a/Marco.Pms.Services/Service/ExpensesService.cs
+++ b/Marco.Pms.Services/Service/ExpensesService.cs
@@ -839,15 +839,22 @@ namespace Marco.Pms.Services.Service
                         $"The sum of the base amount and tax amount ({totalAmount}) does not match the expected expense amount ({expense.Amount}).",
                         400);
                 }
+
+                var result = ValidateTdsPercentage(model.TDSPercentage);
+                if (result != null)
+                {
+                    return result;
+                }
+
                 expense.ProcessedById = loggedInEmployee.Id;
                 expense.BaseAmount = model.BaseAmount;
                 expense.TaxAmount = model.TaxAmount;
+                expense.TDSPercentage = model.TDSPercentage;
             }
 
             // 7. Add Reimbursement if applicable
             if (model.StatusId == Processed)
             {
-                expense.TDSPercentage = model.TDSPercentage;
                 var reimbursement = new ExpensesReimburse
                 {
                     ReimburseTransactionId = model.ReimburseTransactionId!,
@@ -1938,6 +1945,13 @@ namespace Marco.Pms.Services.Service
                         $"The sum of the base amount and tax amount ({totalAmount}) does not match the expected payment request amount ({paymentRequest.Amount}).",
                         400);
                 }
+
+                var result = ValidateTdsPercentage(model.TDSPercentage);
+                if (result != null)
+                {
+                    return result;
+                }
+
                 paymentRequest.PaidAt = model.PaidAt;
                 paymentRequest.PaidById = model.PaidById;
                 paymentRequest.PaidTransactionId = model.PaidTransactionId;
@@ -3745,77 +3759,107 @@ namespace Marco.Pms.Services.Service
             await Task.WhenAll(attachmentTask, documentsTask);
         }
 
+        /// <summary>
+        /// Determines if recurring payments are applicable based on frequency, iteration count, and date logic.
+        /// </summary>
+        /// <param name="numberOfIteration">Maximum allowed payment iterations.</param>
+        /// <param name="frequency">Frequency of recurring payments (e.g., Monthly, Quarterly).</param>
+        /// <param name="strikeDate">The starting date for recurring payments.</param>
+        /// <param name="latestPRGeneratedAt">The date of the latest payment receipt, if any.</param>
+        /// <returns>True if recurring payments are applicable; otherwise, false.</returns>
         private static bool IsRecurringApplicable(int numberOfIteration, PLAN_FREQUENCY frequency, DateTime strikeDate, DateTime? latestPRGeneratedAt)
         {
-            List<DateTime> dates = new List<DateTime>();
-            DateTime currentDate = strikeDate;
-            DateTime endDate = DateTime.UtcNow.Date;
-
-            switch (frequency)
+            // Validate input parameters
+            if (numberOfIteration <= 0)
             {
-                case PLAN_FREQUENCY.MONTHLY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddMonths(1);
-                    }
-                    break;
-                case PLAN_FREQUENCY.QUARTERLY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddMonths(3);
-                    }
-                    break;
-                case PLAN_FREQUENCY.HALF_YEARLY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddMonths(6);
-                    }
-                    break;
-                case PLAN_FREQUENCY.YEARLY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddYears(1);
-                    }
-                    break;
-                case PLAN_FREQUENCY.DAILY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddDays(1);
-                    }
-                    break;
-                case PLAN_FREQUENCY.WEEKLY:
-                    while (currentDate <= endDate)
-                    {
-                        dates.Add(currentDate);
-                        currentDate = currentDate.AddDays(7);
-                    }
-                    break;
+                return false;
             }
 
+            // Ensure strikeDate is in a consistent timezone (UTC or local as per your business logic)
+            var currentDate = strikeDate.Date;
+            var endDate = DateTime.UtcNow.Date;
+
+            // List to store generated dates for validation
+            var dates = new List<DateTime>();
+
+            // Define increment logic for each frequency
+            Func<DateTime, DateTime> incrementFunc = frequency switch
+            {
+                PLAN_FREQUENCY.MONTHLY => d => d.AddMonths(1),
+                PLAN_FREQUENCY.QUARTERLY => d => d.AddMonths(3),
+                PLAN_FREQUENCY.HALF_YEARLY => d => d.AddMonths(6),
+                PLAN_FREQUENCY.YEARLY => d => d.AddYears(1),
+                PLAN_FREQUENCY.DAILY => d => d.AddDays(1),
+                PLAN_FREQUENCY.WEEKLY => d => d.AddDays(7),
+                _ => d => d.AddDays(1)
+            };
+
+            // Return false if frequency is not supported
+            if (incrementFunc == null)
+            {
+                return false;
+            }
+
+            // Generate dates based on frequency until endDate
+            while (currentDate <= endDate)
+            {
+                dates.Add(currentDate);
+                currentDate = incrementFunc(currentDate);
+            }
+
+            // Validation: Must have at least one date and not exceed iteration count
             if (!dates.Any() || dates.Count > numberOfIteration)
             {
                 return false;
             }
 
+            // Validation: Last generated date must match endDate
             if (dates.Last() != endDate)
             {
                 return false;
             }
 
-            if (latestPRGeneratedAt.HasValue && latestPRGeneratedAt.Value == endDate)
+            // Validation: Latest payment receipt should not be on endDate
+            if (latestPRGeneratedAt.HasValue && latestPRGeneratedAt.Value.Date == endDate)
             {
                 return false;
             }
 
             return true;
-
         }
 
+        /// <summary>
+        /// Validates the TDS Percentage in the provided model.
+        /// </summary>
+        /// <param name="model">The input model containing TDS Percentage.</param>
+        /// <returns>Returns an error response if validation fails; otherwise, null.</returns>
+        private ApiResponse<object>? ValidateTdsPercentage(double? TDSPercentage)
+        {
+            // Check if TDSPercentage is present in the model
+            if (!TDSPercentage.HasValue)
+            {
+                return null;  // No validation needed if TDSPercentage is not provided
+            }
+
+            var tdsValue = TDSPercentage.Value;
+
+            // Validate TDS Percentage range: must be between 0 and 100 inclusive
+            if (tdsValue < 0 || tdsValue > 100)
+            {
+                // Log a warning with structured logging for traceability
+                _logger.LogWarning("TDS Percentage validation failed. Provided value: {TdsValue} is outside the valid range (0 - 100).", tdsValue);
+
+                // Return a consistent and clear error response with HTTP status 400
+                return ApiResponse<object>.ErrorResponse(
+                    "Invalid TDS Percentage value. Allowed range is 0 to 100 inclusive.",
+                    "TDS Percentage value out of range.",
+                    400);
+            }
+
+            return null; // Validation successful, no error
+        }
+
+
         #endregion
     }
 }