Setup the tax codes in the menu Setup -> Setup Irish 46G Tax Codes.
Scroll to the bottom to add the codes in the description field and click the + sign to add the code. You can click the red x to remove a code at any time. Click the Save button.
There is already a list of codes provided with the system. User can add or remove codes as needed.
Vendor Maintenance where a vendor, whose is selected as a "Irish 46G Vendor" in Tax Form Requirements, will also have a Default 46G Code defined for the vendor.
Also see Invoices where the default code may be overwritten.