Indirect Tax Laws · Appeals and Revision (GST)

Revision of Declaration in FORM GST TRAN-1 (Rule 120A)

Updated 5 October 2026

Rule 120A of the CGST Rules lets a registered person who has filed FORM GST TRAN-1 revise that declaration once, within the period specified in the rule. The credit must still be eligible. Check that TRAN-1 was filed, no earlier revision exists, time is open, and the credit qualifies.

Understand Revision of Declaration in FORM GST TRAN-1

When GST began, taxpayers carried forward unutilised credit from the old law (CENVAT, VAT and so on) into the GST electronic credit ledger. They did this by filing a one-time declaration in FORM GST TRAN-1 under the transitional provisions (Section 140 of the CGST Act and Rule 117 onwards of the CGST Rules).

A declaration can contain errors. A person may have entered a wrong figure, missed a credit item, or claimed something that was not eligible. Rule 120A gives a way out: the registered person can revise the declaration already filed in FORM GST TRAN-1, instead of being stuck with the first filing. The revision is allowed once.

The relief is not open-ended. Rule 117 sets the time limit for filing TRAN-1. Under Rule 117(1A), the Commissioner could extend that limit on the recommendation of the Council for those facing technical difficulties on the common portal. Rule 120A is separate. It allows a single revision within the period specified, and that period is fixed by notification (as notified or extended by notification). The window was extended on several occasions, so you cannot work out the last date from memory. Exam questions will give the date. The Rule 117(1A) extension relates to filing, not to revision. Do not assume the revision period is the same as the Rule 117 filing limit. Use the period or dates the question gives.

Think of it in three layers. First, the declaration must already have been filed. Second, the credit must be one that the transitional provisions (Section 140 and Rule 117) allow. Third, the revision must be made once, inside the period specified under Rule 120A. Revising does not make an ineligible credit eligible.

Exam questions on this topic are short and case-based. They ask whether a revision is allowed, by when, and what the credit position is after it.

Key rules to remember

Rule 120A in one line: Revision allowed = TRAN-1 filed + single revision within the period specified under Rule 120A + credit eligible under the transitional provisions (Section 140 / Rule 117); All three parts must hold. A second revision, a revision outside the period, or an ineligible credit fails.
Time limit logic: Revision period = period specified under Rule 120A, as notified or extended by notification; Do not equate the revision period with the filing limit under Rule 117. The window was extended on several occasions, so use the date the question gives.
Nature of relief: Rule 120A = one-time correction of a filed TRAN-1, not a fresh right to claim credit; Revision corrects the declaration. Eligibility is still tested under the transitional provisions (Section 140 and Rule 117). TRAN-2 is a different form: it is for details of stock held (Rule 118), mainly for credit on stock supplied by certain traders or dealers.
Extension for portal problems: Filing: technical difficulty on the common portal + Council recommendation → Commissioner may extend the date for filing (Rule 117(1A)). Revision: one revision within the period specified under Rule 120A, as notified or extended by notification; The Rule 117(1A) extension relates to filing. Rule 120A has no such extension power of its own; its revision period is fixed by notification. Do not mix up the Rule 117 filing limit with the Rule 120A revision period.

How to solve Revision of Declaration in FORM GST TRAN-1 questions

Use the same short method for any Rule 120A question. Write the answer in provision, facts, conclusion form.

1Identify what is being asked: whether revision is allowed, the time limit, or the credit after revision.
2Check the fact: was FORM GST TRAN-1 already filed? If it was never filed, the question is about filing under Rule 117 or an extension, not just revision.
3State the rule: a registered person may revise the declaration in FORM GST TRAN-1 once under Rule 120A.
4Check the time: compare the date of revision with the period fixed by notification under Rule 120A, not the Rule 117 filing limit. The period was extended on several occasions, so use the date given in the question.
5Check eligibility: confirm each credit item qualifies under Section 140 and Rule 117 (for example, it was carried in the last return under the earlier law and is backed by the required documents).
6Apply the facts: separate the corrected items from items that remain ineligible.
7Conclude clearly: allowed or not allowed, and the effect on the credit amount.

Quickest way: Three-check shortcut for Rule 120A

When to use it: Use this for case-scenario MCQs and for short written parts where you have only a few minutes.

Check 1: Was TRAN-1 already filed? If yes, think revision under Rule 120A (once only).
Check 2: Is the date within the period specified in Rule 120A? If not, revision fails.
Check 3: Is the credit eligible under Section 140 / Rule 117? If not, revision does not cure it.
If all three pass, the answer is: revision permitted. If any one fails, state which one and stop.

Common mistakes in Revision of Declaration in FORM GST TRAN-1

Treating revision as a way to claim credit that was never eligible.
Students read Rule 120A as a general right to add or change credit.
Fix: Remember that Rule 120A only corrects a filed declaration. Eligibility is still tested under Section 140 and Rule 117.
Ignoring the time limit.
The rule looks like a relief provision, so students assume there is no deadline.
Fix: Always compare the revision date with the period specified in Rule 120A. State the period in your answer, and do not substitute the Rule 117 filing limit.
Confusing TRAN-1 with TRAN-2.
Both forms deal with transitional credit and have similar names.
Fix: TRAN-1 is the main declaration of carried-forward credit. TRAN-2 is the form for details of stock held (Rule 118), mainly for credit on stock supplied by certain traders or dealers. Revision under Rule 120A is about TRAN-1.
Quoting a specific extension date from memory.
Students try to show detail, but the dates were notified separately from time to time.
Fix: Say the Rule 117 filing time could be extended by the Commissioner on the Council's recommendation under Rule 117(1A). Quote a date only if the question gives it.
Saying revision is available to anyone, even someone who never filed TRAN-1.
Students mix up filing and revising.
Fix: Revision presumes a filed declaration. For a person who could not file due to portal issues, answer under the extension provision of Rule 117(1A) and the Council's recommendation.
Writing only the conclusion without the rule and facts.
The topic is short, so students rush.
Fix: Use provision, facts, conclusion. Examiners give marks for each part.

Worked examples

Example 1

Anand Traders migrated to GST and filed FORM GST TRAN-1 within the time allowed. After filing, it found it had entered the wrong amount for one item of credit carried forward from its last return under the earlier law. It has not revised TRAN-1 before, and the period allowed for revision under Rule 120A is still open. Can Anand Traders correct the declaration?

Show the solution

Provision: Rule 120A of the CGST Rules allows a registered person to revise the declaration filed in FORM GST TRAN-1, once.
Fact check: the declaration has been filed, so there is something to revise, and no earlier revision has been made.
Time check: the period allowed for revision is still open, so the revision can be made.
Eligibility check: the credit being corrected is carried forward from the last return under the earlier law, so it can qualify under Section 140, subject to the documentary conditions.
Conclusion: Anand Traders can correct the amount by revising the declaration.

Answer: Yes. Anand Traders can revise its FORM GST TRAN-1 under Rule 120A, because the declaration is filed, this is its only revision, and the period for revision is open. The revised credit remains subject to the eligibility conditions of Section 140 and Rule 117.

Example 2

Meera Enterprises filed FORM GST TRAN-1 and wants to revise it after the period specified in Rule 120A has ended. In the revision, it also wants to add a credit item that does not qualify as transitional credit under Section 140. Advise Meera Enterprises.

Show the solution

Provision: Rule 120A permits a single revision of a filed TRAN-1, but only within the period specified in the rule.
Time check: the period has ended, so the revision is out of time.
Eligibility check: the additional item does not qualify under Section 140, so adding it would not be allowed even if time remained.
Reasoning: revision corrects a declaration. It does not create a right to credit that the law does not allow.
Conclusion: the revision fails on both time and eligibility.

Answer: Meera Enterprises cannot revise. The period allowed for revision has expired, and the item it wants to add is not eligible transitional credit. Revision under Rule 120A needs both time in hand and an eligible credit.

Exam tips

Expect a short case: filed TRAN-1, wants to correct it. Answer in provision, facts, conclusion form.
Write the three checks (filed, within the period for revision, eligible) in your answer. They cover most marks.
Remember that revision is allowed once, and its period should not be confused with the Rule 117 filing limit.
Do not quote extension dates unless the question gives them. The revision period under Rule 120A is fixed by notification and was extended on several occasions. The Commissioner's power to extend on the Council's recommendation under Rule 117(1A) relates to filing.
Link the rule to Section 140 and Rule 117 so the examiner sees you know where it sits in the transitional scheme.
If an MCQ offers the option that revision creates new eligibility for credit, reject it.

Practice questions from Appeals and Revision (GST)

Revision of Declaration in FORM GST TRAN-1: frequently asked questions

What is Rule 120A of the CGST Rules?

Rule 120A allows a registered person to revise the transitional credit declaration already filed in FORM GST TRAN-1, once. The revision must be made within the period specified, which is fixed by notification. It corrects the declaration but does not make ineligible credit eligible.

Who can revise FORM GST TRAN-1?

A registered person who has filed the TRAN-1 declaration can revise it once under Rule 120A, within the period specified by notification. That window was extended on several occasions, and an exam question will give the date. The separate power under Rule 117(1A) deals with extending the date for filing because of technical difficulties.

Does revising TRAN-1 change the conditions for transitional credit?

No. The credit must still meet the conditions of Section 140 and Rule 117. Revision only lets you correct the details in the declaration.

How is Rule 120A different from filing TRAN-1 under Rule 117?

Rule 117 is the main rule for filing the transitional declaration and sets the filing time limit. Rule 120A deals with correcting a declaration that has already been filed, once, within the period it specifies.