Hello student I'm sorry to inform you but student having BHMS degree are not eligible for UPSC CMS as per eligibility criteria - Candidates who've passed the written and practical parts of the final MBBS examination are eligible only.

So you must have passed MBBS for UPSC CMS. Upper age limit is 32 years for UPSC CMS.

Reserved category an female need not to pay any application fees where as General category student need to pay 200rs as application Fee.

For more details refer to the link mentioned below - https://www.google.com/amp/s/news.careers360.com/upsc-cms-2020-notification-released-check-details-here/amp

Feel free to comment if you've any doubt

Good luck