How can tax paid be recouped and adjusted in case of return of goods attracting reverse charge

There is no provision in section 34 of the CGST Act or Rule 52 of the CGST Rules, 2017 regarding reversal of tax paid. Equity demands that relief be allowed to the recipient who has paid the tax so that the recipient may apply for refund under section 54 of the CGST Act and not issue credit note or revised invoice for which there is no provision. This relief to claim refund will be subject to credit not being availed by the recipient on the tax so paid.

(ICAI FAQ PUBLICATION 06-09-2017 REVERSE CHARGE : FAQ NO. 29)

Is reverse charge applicable on awarding contract or issuing Purchase Order (PO)

Reverse charge is applicable only when there is a supply. Supply ‘agreed to be made’ is regarded as a supply only in case of supply under section 7(1)(a) and 7(1)(c). Even though actual supply is yet to take place, in the case of supplies covered by these two provisions, tax would be payable on award of contract or issue of PO because this itself amounts to supply. However, Table 4 of GSTR-2 requires reference to be made to invoice in respect of supplies liable to reverse charge but Rule 52 does not provide for issuance of invoice earlier than the time of payment. As such the absence of machinery provisions to pay tax at the time of contract / PO, it appears that the liability fails.

(ICAI FAQ PUBLICATION 06-09-2017 REVERSE CHARGE: FAQ NO.28)