Field help (PTHVAT1) 

This field is used to enter a first tax code to apply to the received product.
The tax codes (VAT, additional levy and/or special tax, regional tax) can be modified in the receipt line if the transaction authorizes it.
They are normally initialized according to the tax determination rules that most often stem from crossing the supplier tax rule with the tax levels of the entered product.

Click the Actions icon to select a tax code for each tax level.
Only one tax code consistent with the legislation and group of the company on the site can be entered.

SEEREFERTTOThe general principles linked to the multi-legislation setup are detailed here.