Post Brexit Tax Codes

SOLVED

For postponed VAT accounting the Sage advise is for postponed VAT accounting you use tax code T18.  I have a purchase order to raise on German supplier.  Using tax code T18 shows VAT amount on the order.  My German supplier invoices me net and i pay him net, yet using T18 it will still show on Purchase Order Process and supplier record that we owe them for the VAT element.  How do you resolve this, otherwise surely our accounts will start accumulating in purchase records a mounting debt?