What HRA exemption is
HRA is the part of salary your employer pays towards a rented house. In the old regime, some of that HRA is exempt if you actually pay rent for a place you live in.
HRA exemption is not available in the new regime. The new regime has been the default from FY 2023-24 (Finance Act 2023). To claim this exemption, opt for the old regime.
You need all three of these:
You must receive a salary, not business income. Self-employed people cannot claim HRA.
The payslip has to include HRA. If your employer does not pay HRA, there is no exemption to claim.
You must live in the rented place and pay the rent. Living in your own house does not qualify.