creation of a prestashop module

We need to make a module for version 1.7.6 with the following functions: Possibility of modifying the vat of product in the basket thanks to a special product. example: air conditioning with 20% VAT if sold alone air conditioning with vat at 5.5 if sold with an installation product and house over 2 years old the installation product must also have the possibility of saying that the dwelling is more than 2 years old