This discussion clarifies how to handle credit notes received from service providers. It explains that a credit note issued by a supplier is effectively a debit note for the recipient. The consensus is that the credit note amount should be deducted from the input tax claim in the current or subsequent GSTR-3B filing. While there are two methods for accounting for this deduction in GSTR-3B, the core principle is to reduce your overall input tax claim by the credit note value, rather than claiming it as input tax.