public virtual double CalculateNetPayableTax()
{
double netTaxableIncome = CalculateGrossIncome(TaxPayer)
- GetChapter6Deductions();
return(TaxSlabs.GetInstance().ComputeTax(netTaxableIncome, TaxPayer) - (AnnualSalary.ProfessionalTax + AnnualSalary.TaxDedeuctedAtSource));
}