According to Section 16(2)(c) of the CGST Act 2017, a registered person can avail ITC on his inward supply, if his supplier has paid tax in his return to the Government, either in cash or through utilisation of ITC admissible in respect of the said supply.
Further, as per Section 50(3) read with rule 88B(3), in case of wrong availment or utilisation of ITC, the registered person shall pay interest on such wrong availment or utilisation of ITC at the rate of 18%.
As per Section 122(2)(a), any registered person who has not paid or short-paid or erroneously refunded the tax on its outward supplies, or whether ITC has been wrongly availed or utilised for any reason other than the reason of fraud or any wilful misstatement or suppression of facts to evade tax, shall be liable to a penalty of 10,000 or 10% of the tax due from such person, whichever is higher.
Therefore, in the given case, the issuance of notice by the proper officer for reversal of ITC along with Interest & Penalty is valid and the taxpayer is required to reverse ITC along with Interest & Penalty. However, the taxpayer can re-avail the ITC reversed, once his supplier has paid tax to the government.
On the other hand, the supplier can get a notice from the proper officer demanding to pay tax along with Interest u/s 50 and Penalty u/s 122(1)(iii)