Correcting Tax Type Allocations

SOLVED

In previous versions of Partner you could correct a misallocated tax type by entering the exact same journal/ cashbook, but with a negative value

The example below would normally have created a positive value in Tax Type 2 - Output Tax

Tax Type Date Type Account Reference Description  Exclusive 
Tax Type : 2 - Zero rated - Output Tax 07/08/20 CB 2 RECEIPTS 4362/900 D08/84 SEQOUIA NURSERY   (44,115.00)
Tax Type : 2 - Zero rated - Input Tax 07/08/20 CB 2 RECEIPTS 4362/900 D08/84 CORRECTION     44,115.00

In v18 the corrections are automatically changed to the opposite side. 

Problem now - both Output and Input VAT are incorrect.

Does anyone know of a way to correct the VAT report, so that the correct Input/ Output are shown?

Thanks