You were under Composition Scheme (Section 10 of CGST Act) in FY 2019-20 and 2020-21. You unknowingly made inter-State supply, which is not permitted under the composition scheme under Section 10[2A][b]. Department has issued a notice u/s 74 of CGST Act (for tax not paid/short paid due to fraud/suppression), directing you to pay 18% GST on total turnover for those years.
Key Points: 1. Violation of Section 10[2A][b]: Once you made inter-State supplies, you became ineligible for composition. Legally, you should have shifted to regular scheme and paid tax at normal rates.
2. Liability: Department can demand GST at applicable rates (say 18%) on turnover of those years. They may also demand interest (u/s 50) and penalty.
3. Input Tax Credit (ITC): ITC benefit can be claimed only if you had switched to regular scheme at that time and filed returns accordingly. Since you continued under composition, practically you did not avail ITC then. Courts have allowed such set-off of ITC in genuine cases (to avoid double taxation).
4. Reduction of liability / defense : You can file a reply to the notice u/s 74 and argue: There was no intention to evade; it was a genuine mistake. Therefore proceedings should be under Section 73 (no fraud), not 74. Request waiver/reduction of penalty. Seek adjustment of eligible ITC on inputs, capital goods, and services used in those periods.
5. Case Laws:
Allahabad High Court in Bharat Mint & Allid Chemicals Vs. State of UP - 2025 (6) TMI 1243 - ALLAHABAD HIGH COURThas held that a SCN under Section 74 cannot be sustained if there is no allegation of fraud, wilful mistatement, or suppression of facts.
In the light of this judgement, you could argue that liability should instead be under Section 73. Interestingly for the FY 2019-20 and 2020-21 the jurisdiction for adjudication under Section 73 is hit by limitation. If this arguments clicks in your favour, you are on the safer side. Take a chance.