Sometimes the QR Code may stop working (after midnight)
To check the report for such issues, go to your iTax account, under the TIMS menu, click “Report on invoice discrepancies for Taxpayer”.
Errors shown on this report may include Invalid HSCodes (KRA times updates HSCodes), Invalid PIN numbers, or Invalid Vat Amount (this is explained below).
The below explains how KRA handles decimals, which causes differences in values. Once KRA advises on a better way forward, this issue will remain.
Original document is below;