As per Section 128A(1) of CGST Act 2017, where any amount of tax is payable by a person for which a notice u/s 73(1) or statement u/s 73(3) has been issued but no order u/s 73(9) has been issued, pertaining to the period from 1st July, 2017 to 31st March, 2020 (i.e. FY 2017-18, 2018-19 & 2019-20), or a part thereof, and the said person pays the full amount of tax payable as per the notice or statement on or before the 31st March, 2025 then no interest under section 50 and penalty under this Act, shall be payable and all the proceedings in respect of the said notice or statement, as the case may be, shall be deemed to be concluded.
Further as per the 3rd proviso of the said sub-section where such interest or penalty has already been paid then no refund shall be available
As per Rule 164(1): Any person who is eligible for waiver of interest, or penalty, or both in respect of a notice or a statement mentioned in clause (a) of sub-section (1) of section 128A, may file an application electronically in FORM GST SPL-01 on the common portal, providing the details of the said notice or the statement, as the case may be, along with the details of the payments made in FORM GST DRC-03 towards the tax demanded.
Further as per Rule 164(6), FORM GST SPL-01 needs to file within a period of 3 months from 31st March, 2025.
In the given case, if notice or statement u/s 73 is for FY 2017-18, 2018-19 or 2019-20 the registered person is eligible for the GST Amnesty scheme u/s 128A and needs to file FORM GST SPL-01 within 3 months from 31st March, 2025