Help required - VAT return needs to be in asap and I have spent an inordinate amount of time trying to work this out, but failing at the last hurdle!

Re: 'How do I post import VAT and duty on goods purchased from a country outside the UK?' article.

Not using postponed VAT accounting, and posting an invoice for the duty and import VAT before getting the C79, then trying to post the journal when the C79 received.

The tax codes in our system do not mirror the Sage defaults, so our equivalent to the Sage default T19 (import of goods - VAT not postponed) is T32 (automatically set up by Sage as far as I remember...)

However when I try and enter T32 into the journal I get the following message:

It will accept T19, but that is not set up as anything in our system.  How can I get the tax code T32 accepted by the journal?