Initial

Domain/Domain.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net8.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+</Project>

Domain/SalaryDetails.cs

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+namespace Domain
+{
+    public class SalaryDetails
+    {
+        public decimal GrossAnnualSalary { get; set; }
+        public decimal GrossMonthlySalary { get; set; }
+        public decimal NetAnnualSalary { get; set; }
+        public decimal NetMonthlySalary { get; set; }
+        public decimal AnnualTaxPaid { get; set; }
+        public decimal MonthlyTaxPaid { get; set; }
+    }
+}

Domain/TaxBand.cs

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+namespace Domain
+{
+    public class TaxBand
+    {
+        public int LowerLimit { get; set; }
+        public int? UpperLimit { get; set; }
+        public int TaxRate { get; set; }
+    }
+}