Form J vs Form JA: What LHDN's Assessment Notices Actually Mean (2026)

An envelope arrives from LHDN. Somewhere on it are two letters: J, or JA. Most people cannot tell the difference, and the difference decides what you do next and how long you have to do it.

Here is the short version.

• Form J — Notice of Assessment. LHDN has assessed the tax for a year of assessment and this is the notice of it.
• Form JA — Notice of Additional Assessment. LHDN has looked again and says you owe more than was assessed before.

If yours says JA, somebody at LHDN has formed a view about your file. That is not a letter to put in a drawer.

The part that confuses everyone: the assessment you never received

We operate a self-assessment system. When you file your return, the return itself is generally treated as an assessment deemed to have been made — that is section 90(1) of the Income Tax Act 1967. There is no letter, no Form J in the post. The assessment simply happens.

So when a client tells us “I never got any assessment”, that is usually true and beside the point. There was one. It was theirs.

An amended return filed under section 91A is likewise a deemed assessment. And where LHDN is not satisfied — after an audit, after a query, after information from elsewhere — it can raise an assessment or an additional assessment under section 91. That is when a real Form J or Form JA lands on your desk.

Why the label matters: your right of appeal

This is where the distinction bites, and where taxpayers get caught.

Where LHDN raises an assessment or additional assessment against you, you can appeal under section 99 by filing Form Q, and you have 30 days from the date of the notice. Not 30 days from when you opened it. Not 30 days from when your accountant told you about it. From the date on the notice.

Where the assessment is a deemed assessment — your own return under section 90(1), or an amended return under section 91A — the right of appeal under section 99 does not apply in the ordinary way. You cannot simply appeal against your own filing because you have changed your mind about it.

There is an important qualification, though, and it is one worth knowing: an appeal is still allowed where the taxpayer disagrees with the tax treatment applied, based on the Public Rulings or the prevailing position, rulings and practices of the Director-General at the time the assessment was made. That opens a door in exactly the situation where a taxpayer followed LHDN’s own published position and now wants to challenge it.

New in June 2026: appealing through MyTax

LHDN expanded its e-Rayuan Taksiran (e-Assessment Appeal) facility on the MyTax portal in June 2026. It now covers not only Additional Assessments but also Estimated Assessments, Deemed Assessments and Reduced Assessments.

Two practical points about it:

1. The manual route still exists. Forms Q and N remain in force, because the online system has not been fully implemented. You can appeal online through the portal, or on paper at an LHDN office.
2. Pick one channel and stay in it. You cannot submit the same appeal through both the portal and the counter.

If you are already out of time, the instrument you need is Form N — the application for an extension of time to appeal. It is not automatic, and the reason you give matters, so do not treat it as a formality.

What to actually do when the notice arrives

1. Read the date on the notice and count 30 days from it. Write that date somewhere you cannot ignore.
2. Check which form it is. J or JA, and which year of assessment. An additional assessment usually means there is a file note behind it — an audit, a query, a mismatch.
3. Find out what changed. Which year, which section, which deduction was disallowed, and on what evidence. You cannot argue against a number; you argue against a reason.
4. Do not pay it just because it looks official, and do not ignore it because it looks wrong. Both instincts cost money.
5. Get advice before you write back. Correspondence with LHDN becomes part of the record, and a helpful letter written by the wrong person on the wrong facts is very hard to unwrite later.

One more thing about the clock

The 30 days is real. Miss it, and the assessment on that notice stands — however wrong it is — unless an extension is granted. We have seen taxpayers with a genuinely good case lose it on the calendar rather than on the merits. That is the most avoidable way to lose an argument with the Revenue.

If a Form J or Form JA has arrived and you are not certain what it means, send it to us before the clock runs down. See also our tax law practice, and our notes on appealing an LHDN assessment, LHDN tax audits and judicial review against LHDN.