You can claim refund of accumulated ITC based on formula prescribed in cgst rules. circular no. 139 merely clarifies that refund of ITC on acoc*nt of RCM payment can be claimed. however, even without this circular, supplier was always eligible to avail refund of such ITC
Hemal yes RCM was eligible before But CBIC issued Circular (135/05/2020 dated 31stMarch2020) which mentioned ITC which is shown in GSTR2A of applicant will only be eligible for refund due to which Dept is disallowed or rejecting the RCM ITC for refund.
Thus the circular mentioned above i.e. 139/09/2020 was issued to clarify and allow RCM, ISD and Imports ITC for refund even though not shown in GSTR 2A.
You can refer my blog on same for details- https://capratikpgst.blogspot.com/2020/06/gst-refund-clarification-dated-10th.H T M L
Refund of unutilized input tax credit on account of exports without payment of tax .
I m filing refund under this head . For example if I am filing refund for tax period May 20 . In that case can I claim ITC accumulated of July 17 to till May 20 ???