Hi,
I need to post an adjustment journal so that 100% VAT is moved to the VAT liability account and is captured on the VAT return.

I have entered the general journal as above, but the VAT amount box is not populated. (I have setup the VAT Posting so that the combination of FULL NORM and ADJ should be 100% VAT.)
When I preview posting I get the following error:

What is the correct way to post this adjustment?
Thank you in advance,
Nicola