To find the Gmail you used in your JEE Mains form, try these steps: First, check your phone or computer for emails from JEE Main or NTA, which will be sent to that Gmail. You can also try logging into Google with your different Gmail accounts and look for JEE related emails. If you still can’t find it, visit the JEE Main official website and try the “Forgot Email” or “Retrieve Application” options using your details like phone number or date of birth.