CATEGORY and PER CUSTOMER CONDITIONS & TAXES

would be gorgerous to be able to put a generic “payment terms” (7 days), as i can already but OVERRIDE it with a specific “per customer”… let’s say CUSTOMER 1 has 30 days and always STRIPE. I want all invoices for him to be generated like this. – also, each “item sold” should have a category (whatever, free text, like the “category” of a wordpress page… the idea is to be able to have “per product category” stats – tax cumulation / year : an automatic counter, for each “fiscal year” of all taxes… to ease my accounting life 😉