It will be good for users to have an option to add free item (not a product), and in this item the user going to have the opportunity to add the price and other info. This free item will be good to position immediately after products in that order and not to discounts or fees.

The purpose is to add prices for something different of product value, fee or others already defined.

Thank you

I would expect that the EU VAT and the "create account" section in WooCommerce would be part of the fields that can be edited (moved around) as well, which is not the case.

Without creating a new field and using a different string, the only way to control the validation of this field would be to add a snippet