JoSAA

Provisional JoSAA Seat Allotment Letter
Three passport size photographs same as uploaded during JEE Main 2019 application form
Candidate Undertaking
Proof of Seat Acceptance Fee payment
JEE Main Score Card 2019
JEE Main Admit Card 2019
Class 10th Standard Mark Sheet or Date of Birth Class 12 Mark Sheet
Pass Certificate
Valid photo Identity Card
Medical Certificate
Category Certificate (if applicable)
PwD Certificate (if applicable)
OCI Certificate or PIO Card (if applicable)
Registration and Filled Choices for Seat Allotment.

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.