If you find that the received VAT invoice is wrong, you can return it to the seller in the current month, and the seller can void it and issue you a correct one again. If it is issued every other month (last month), you should issue a red-ink invoice application form (in duplicate, one for your company and one for the tax authority) from your billing system, and apply to your local tax authority for tax payment with the application form (in triplicate, one for you).