hay 
I use oscommerce bootstrap, which PL Systems has set up and sold me. Only this guy has no idea what he's doing and I can fix the bugs now.
the first problem is that the Paypal checkout does not include VAT. Shipping module DHL...
Shop total amount: 63,37€ and in the Checkout is already 62,47€. The 19% value added tax is missing... how can I correct this error?   many many thx