Briefing
SST codes that survive the demo and fail at month-end
Tax codes in an invoice application are only as good as the defaults that fire when a clerk is busy. Month-end spreadsheets often hide the gap.
Defaults do the real coding
During implementation, someone maps a careful list of SST treatments. After go-live, invoices inherit a code from the vendor master, from the last invoice, or from a PO that was written before the mapping existed. Clerks are measured on throughput. They do not reopen the tax screen unless something looks obviously wrong.
We sample invoices that should be exempt, standard-rated, or out of scope, and we compare them to the workbook that supports the SST return. Where a reconciling tab exists, we read it. A reconciling tab is not a control; it is a record that the application and the return already disagree.
What we will not do
We do not replace your tax agent. We do not sign a return. We examine whether the invoice application applies the treatments finance believes it applies. If you need an opinion on a particular supply, that is a different letter from a different professional.