In Tax Cards , you have defined one or more Tax Rates for Tax Types. All tax rates defined for the VAT tax type are listed in the "VAT Group" drop-down box.
You can select the rate you want to apply and the System will display the VAT rate and VAT amount.
If you do not want to apply tax, you can leave it as "None".
Net amount
In case of tax application; Net Amount, VAT base and tax base are added.