Hello Sushant,
It will not affect much if you have filled your correct name and all other details. If asked by IIT Patna officials show them the transaction id if SBI Collect and also your personal ID and say to them that you have filled your birthdate wrong by mistake.
Hope this helps.
Good luck!!
College Comparison based on Courses, Placement, Rank, Fee
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile