Hi,
It's quite complicated. As you can see, we use ModernBill for our billing system. It's a nice system that allows us to keep track of client signups, their renew dates and even when they have paid invoices (all automated). However, it can't issue a proper VAT invoice and when we showed an example to our accountant he said it's fine for normal accounts but not for paying VAT. We now have to migrate all invoices into another accounting system (an offline system) and these invoices can be sent to you on request.
Our prices already include VAT so there is no chance of any nasty surprises and our offline system keeps a ledger balance of VAT due. There is nothing for you to worry about
