Where ITC is wrongly availed but not utilized, one can take benefit of Section 50 (3) of the CGST Act, 2017 read with rule 88B (3) of the CGST Act, 2017.
But, this benefit is not available where any output tax liability was not disclosed & paid while filing return for the month when such output liability arises. In other words, subsequent payment of output taxes upon Dept's audit objection, interest is payable u/s 50 (1) of the CGST Act, 2017 read with rule 88B (3) of the CGST Act, 2017 even when tax-payer is having constant ITC balance in his ledger for in-between period.
These are ex facie views of mine and the same should not be construed as professional advice / suggestion.