All cashbacks above 50k per financial are must be reported. I saw a post in tf only earlier by
@SSV I think
In clear tax it says
For individuals, cashback received as part of a purchase (e.g., from credit cards, e-wallets, or online shopping platforms) of goods/services for personal use is treated as a gift u/s 56(2) of the Income Tax Act, 1961 and taxed at the applicable slab rates, if the sum of money without consideration exceeds Rs. 50,000. However, if the cashback received is less than Rs. 50,000, it is exempt and should be reported in the ITR as an exempt income.