How to reject a seat in college after freezing my option in counsellig?

Thank you miss OJHAseat it helped I have withdrawn my seat according to process.Can we use the amount Rs.35,000/- for special round? 

It's about josaa 2019 counselling round 1.

You can reject a seat before the last round of counselling(7th round of allocation). These are the rules for seat withdrawl, taken from the official business rules of JoSAA(Section 22, page no. 39) 58. A candidate, who has already accepted a seat allotted by JoSAA 2019, can withdraw the seat by reporting at a reporting center up to  6th round of seat allocation before the last round of seat allocation (i.e., if JoSAA conducts total of seven rounds of seat allocation, candidates can withdraw up until during sixth round of seat acceptance period).        59. Candidates who have exercised withdraw option will not be considered for subsequent rounds of seat allotment. Seat acceptance fee will be refunded to these candidates after deducting the processing charges of Rs. 1500/-.   60. There is no option of withdraw of an accepted/allotted seat after the announcement of last round of seat allocation (For IITs only). 61. For exercising withdraw option, candidates have to complete the following two steps.  (A) On the JoSAA portal fill-in the Bank Account details to which the seat acceptance fee shall be refunded and upload an image of cancelled cheque of the same account in JPG format. Then download the withdrawal request letter. (B) Both the candidate and his/her parent should sign the withdrawal request letter and report at a reporting centre to vacate the seat. (C) Candidates who have completed (A) but not (B), that is, not reported at a reporting centre, will not be treated as exercising withdraw option. The seats accepted by such candidates will not be released and will continue in their names. Here is the link to business rules : https://josaa.nic.in/webinfocms/Handler/FileHandler.ashx?i=File&ii=155&iii=YHope it helps.