The 7th round will mark the freezing of your seat allotted in IIT BHU if you have been allotted one. Keep checking the IIT BHU website for official notification regarding the reporting date and time in the institute. The institute will also release a notification for hostel allocation and you have to first go to your respective hostel rooms. During the window of time provided by the institute, you have to physically register and do all the paperwork related to your admission and your specific branch in which you have been placed. At the reporting venue, you have to produce all your certificates and forms. These certificates comprise of your JEE scorecard, 10th mark sheet, 12th mark sheet, caste certificate if applicable, identification proof, photos, mess charge advance receipt, academic fee receipt. Forms include various undertakings, annexures, and income certificates. These forms and certificates must be self-attested before submitting them. Post submission, you will be provided with a college ID card, internet authentication details, and an official appreciation letter for your seat at IIT BHU.
Above is the full process of reporting at IIT BHU after the 7th round of JoSAA counseling.