When we do credit notes for invoices from 2007, the tax is calculated at the new rate (5%) for the credit. When we are doing a full return we want to credit the original amount. How do we adjust the tax amount on the credit note?

Hi Sammy,

As you see, you can't change the tax rate on the fly for credit notes (or invoices). What you need to do is Copy your Tax Group to a new code and maintain the old GST rate (6%) there. When you need to issue a credit note based on the old 6% rate, change the tax group on the credit note to the other tax group code that uses 6%.

For a list of changes to how to change a tax rate, see this tech tip by clicking here.

Thank you. I will make a new "old" tax group.