Reading a MyInvois rejection without panicking

Rejections are routine. Treat them that way.

MyInvois rejects invoices for predictable reasons. Most rejections happen because a field is the wrong shape, not because anything is fundamentally wrong with the sale. Once you know the patterns, fixing a rejection is a 30-second job.

ERR202 — TIN format invalid

Your buyer's TIN doesn't match LHDN's format. Malaysian corporate TINs start with C and have 10–13 digits. Individuals start with IG.

Fix: ask the buyer for the correct TIN. If they're an individual customer (B2C), use the placeholder EI00000000010.

ERR204 — TIN not registered

The TIN format is right, but LHDN doesn't recognise it. Usually a typo.

Fix: double-check the TIN against the buyer's letterhead. ZeroKey can also do a lookup from the BRN if you have it.

ERR301 — MSIC code missing

Every line item needs an industry classification code. If the invoice has none, LHDN rejects.

Fix: pick the MSIC code that matches the type of work you're invoicing for. ZeroKey suggests the right code based on the item description.

ERR405 — Totals don't match

The sum of line items doesn't match the invoice total, or the SST line doesn't add up. Usually a rounding issue from your accounting system.

Fix: ZeroKey catches this before submission. If you've hit it, the invoice page shows which line is off by how much.

ERR501 — Outside cancellation window

You tried to cancel an invoice more than 72 hours after validation. LHDN won't allow it.

Fix: you can't cancel. Issue a credit note instead. ZeroKey supports both in one click each.