Good point. The comments at the top of the file say what's handled and what's not, and HRA is not.
About basic, yes, that's a pain.
About basic, yes, that's a pain.
I built this for my needs. If you want it to handle HRA, or LTA, or income 1 crore and above, etc, that's an entirely reasonable point of view, and I'd welcome a pull request if you have the time.
The script does have a field for EMPLOYEE_TAX_DEDUCTION. It defaults to 1.6 lac, assuming 1.5 lac for 80C and 10K for the rest (like medical insurance under 80D or whatever). But you can change it to whatever number you want to include other exemptions like HRA and LTA.
I think some things like PF and HRA are calculated based on basic income, but I was able to approximate the calculation without bringing basic income into account. Salary for the purpose of PF is limited to 15K anyway.
Again, enhancements welcome.