PS: I would be very grateful if someone could answer the questions bellow.
Q1: Can I sell my software if I do not have a firm?
Q2: Should I add VAT when someone is ordering my software?
Q2.1 If yes, what should I do with the extra money (from the VAT) that I collected from the buyer?
Q3 If you have a return money policy, should you return the already paid VAT?