Hi Steve,

You're assuming that the tax invoices were dated the same day as the original invoices.

I wouldn't recommend using GV RW for this without a lot of care and careful backups (and even then I don't think it's a good idea).

A better way of fixing this type of problem is to credit the original invoice (4 mouse clicks), re-create the invoice with the correct tax status, (another couple of clicks), and and post the correct invoice.

How did they manage to create an invoice of just tax charges? I wouldn't have thought that was possible.