i m looking for help to make invoices following italian law requirements. All i need is 2 field for total one with all vat+cost , the other with vat+cost-prepaid taxe

Example

with a total of 2000$ will be something like this

subtotal: 2000

vat : 440

Total+Vat=2440

PPT: -400

Tota:l 2040

the most important is to show the 2 field of total+vat 2440 and final total 2040

is that possibile? if yes can someone tell me how?

thanks very much