Invoices and credit memo print
After you print, you can no longer maintain the invoices and credit memos. Only invoices and credit memos that are in a Released status are printed in Billing. If invoices or credit memos are in an Unreleased status, then you must release them before printing. You may also be required to run Invoice Verification Report before you can print invoices and credit memos. You can use Invoice Verification Report to view invoices and credit memos one last time before they are printed.
You can print the company or customer VAT registration numbers on invoices and credit memos if you add the VAT numbers in Tax and Receivables. In Tax, you add VAT registration number in Company. You can assign a VAT type to your company in Tax Codes. In Receivables, you add VAT numbers in Customer.