India

Dear Saesh , the course fee differs depending on various factors, like the duration , course content , band , certification , location ( Cities ) etc . Hence I suggest , 1st you decide the institute, go personally and visit them , if you are satisfied with all other factors then talk about the fees to them directly , also check for EMI options , maximum of the institutes offer EMI facilities on 0% interest rate.

IHM Ahmadabad is a good option for you

IPU is best
visit site ipu.ac.in
here u will get admission information

Yes of cousre but for that u have to qualify the NDA exam which conducted by UPSC every year

Hi Dear,
Kindly go through the below link. Hope this will resolve your query.
https://www.shiksha.com/jee-mains-college-predictor
https://www.resonance.ac.in/jee-main-answer-key-solutions/jee-main-2016-rank-predictor.php
All the best. Feel free to revert.

PEC &GNDU amritsar panjabi university. Chandigarh university

Here is one exhaustive list of taxation diploma course in India and The colleges which offer the same.
https://banking.shiksha.com/diploma-in-accounting-taxation-courses-in-gujarat-categorypage-4-74-528-0-0-1-109-2-0-none-1-0