What values of tax and retail invoices are captured as the gross sale value in Form VAT 15? (Chandigarh)

The assessable value and tax amount entered in the tax invoice (the option Use as tax invoice? is set to Yes in the sales voucher type) and retail invoice (the option Use as tax invoice? is set to No in the sales voucher type) are captured as gross turnover in box 1(a). The tax amount of tax invoice is captured for deduction in box 1(f).