Hello,
Yes, you need to upload medical certificate at the time of online reporting and online verification of documents. You can find the medical format in JoSAA Information Brochure on the official website: https://josaa.nic.in/ (https://josaa.nic.in/WebInfo/Page/Page?PageId=1&LangId=P)
During online verification of certificates you need to respond to the query/queries of the verification officer within the given time. So you need to login from time to time and check if there are any queries and respond to them immediately.
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