SYS21 - Financials Interface files and UK VAT (FLPUK4)

Hi,
I'm writing a routine to post transactions to SL and GL thru the SLPI0/1
and corresponding FLPI* files, but I'm unsure as to how to populate
FLPUK4 for Vat;

Firstly, what goes in each field on FLPUK4.

Secondly, if transactions fail validation in the posting routine and are
flagged as being in error, what effect does that have on the system if
the interface program has already written directly to FLPUK4?

Surely this must be documented somewhere?

Many thanks in advance,

Neil.

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