Hello Abhay,
Can you pls check the below things once again?
1. Create a condition record by T.code FV11 for any of the condition record in your tax procedure TAXINN
2. Also check tax code - S1 header and line item should be the same
3. Also check the FTXP Settings - did you create the S1 tax code in the stated tax pro - TAXINN and also check the GL account assignment and tax type data also.
4. Did you assign the tax pro- TAXINN to the correct country - IN in OBBG ?
You have to do the saving of the data once done all the modifications else those changes wont get reflected.
Please check this and revert us for any issues.
Thanks & Regards,
Lakshmi S