BR-E-09: VAT amount wrong for category "E"
This code shows up when an electronic invoice is validated. Here is what it means, why it fires, and what to change in the file.
Why this code appears
For category E (exempt), the VAT amount declared is not the taxable amount multiplied by the rate. An exempt transaction calls for no VAT: the expected amount is 0.00.
How to fix it
Recalculate the amount from the base and rate written in the SAME breakdown, then round to the cent. One- or two-cent gaps almost always come from a total computed line by line and then added up, instead of computed on the aggregated base.
Where it happens
This code comes from EN 16931, the European e-invoicing standard. It concerns business term BT-117.