JoSAA

Yes, you can select float option but for that also you have to visit the reporting center. You have to attend the reporting center if you want any college through JoSAA. You have to go to the allotted reporting center as per mentioned on JoSAA website.

Seat acceptance fee is onetime payment in JoSAA round, you don't have to pay every time.

Residential certificate is not required as home state is decided on the basis of from where you did your class 12th. If you did your class 12th from Haryana, then your home state will be Haryana.

No it is not necessary that you have to pay for every round of counselling. First, you accept then you have to pay for that only.

You just have to login on JoSAA website to check your seat allotment on the given dates.

You have to put your general merit list rank in that only then you will be able to get the best results out of that.

Yes, medical certificate is required for everyone apart from PWD certificates.

District Magistrate / Additional District Magistrate / Collector / Deputy Commissioner / Additional Deputy Commissioner / Deputy Collector
Revenue Officers not below the rank of Tehsildar.
Sub-divisional Officer of the area where the candidate and/ or his family normally resides.