The details of tax invoice issued for taxable purchases from unregistered taxpayers (subject to the notification no 8 which exempts intra-state purchases if less than Rs 5000 in a day) bearing the GSTIN of the recipient will be reported in GSTR 2. The recipient has to also declare his credit eligibility on such input tax paid. The reverse charge tax has to be paid in cash and the credit can be utilised in the same month return. At present there are no provisions in GST act and rules which restrict the usage of such claimed ITC.
Reference from CGST Act :
The amount deducted under section 51(Tax deduction at source), or the amount collected under section 52(Collection of tax at source), or the amount payable on reverse charge basis, or the amount payable under section 10(Composition levy), any amount payable towards interest, penalty, fee or any other amount under the Act shall be paid by debiting the electronic cash ledger maintained and the electronic liability register shall be credited accordingly