Go to Invoicing >> Invoice Print and open the History / Reprint tab.
Click Refresh to load the invoice list.
Find the invoice you want to amend, right click on it, and select Account Details.
Go to the Addresses tab.
Identify which address number is currently being used on the invoice, for example 0001.
You can check this by looking at the Address & VAT tab on the invoice itself.
Select the address you need to amend and click Edit Address at the bottom of the screen.
Make the required changes, then click OK followed by Apply.
Return to the Invoice Print History / Reprint screen.
Double click the invoice to open it.
In the Address & VAT tab, click Update to current address to apply the amended address to the invoice.