Dear Rajendra Prasad Ji,
Yes, you can claim refund of unutilised balance lying in electronic credit ledger at the end of any tax period if such balance has been accumulated for the reason that rate of tax on inputs if higher than the rate of tax on output supplies. For this, you can refer the provisions of section 54(3) of CGST Act, 2017 read with rule 89(5) of CGST Rules, 2017 [corresponding provisions are similar under State GST Acts].
Kindly note that there is an ongoing dispute regarding eligibility to claim refund in respect of input services under inverted duty structure. We are of the view that as per law, said refund should be allowed because there is no restriction under the Act and the same has been imposed by way of inserting formula in rules. If you have such balance, it is recommended to included portion of input services as well so that if matter is resolved by higher judiciary in future, you claim does not get barred by time. Hon'ble High Court of Gujarat and Rajasthan has already admitted certain writ petitions praying for eligibility of refund of input services under this model - [2018 (9) TMI 1475; 2019 (1) TMI 1608; 2018 (9) TMI 1766 and 2018 (8) TMI 587]
Further, refund of transitional credit cannot be claimed under inverted duty structure. This has already been clarified by the CBIC [Refer para 50 of Circular Number 125/44/2019-GST dated 18.11.2019].