JEE Main registration happens online through the National Testing Agency's official JEE Main portal, typically in two separate windows — one for the January session and one for the April session — each requiring a fresh application even if a candidate is attempting both. The process needs a valid email and phone number the candidate actually controls, scanned photo and signature in the exact specified format, Class 10 and Class 12 (or equivalent) academic details, and category or PwD certificates where applicable. The most common, entirely avoidable mistakes happen in photo/signature formatting, city and exam-mode selection, and missing the correction window — not in anything related to actual exam content.

Key Takeaways

  • JEE Main registration opens in two separate windows for the two sessions — Session 1 typically registration in November-December for the January exam, Session 2 typically in January-February for the April exam — and each requires its own application.
  • Always confirm exact current-cycle dates on the official NTA JEE Main portal — published dates can shift, and no third-party source should be treated as final.
  • Photo and signature specification errors (wrong size, wrong background, wrong file format) are the single most common reason applications get flagged or need correction.
  • The correction window that follows the main registration period is a genuine safety net — but only if a candidate actually checks the submitted form against it, rather than assuming it went through correctly.
  • Category, PwD, and state-of-eligibility certificates should be scanned and ready before the form opens, not searched for under deadline pressure.

The Two-Session Registration Structure

JEE Main runs in two sessions each year, and registration for each is a genuinely separate process — a candidate who wants to attempt both sessions (which most serious aspirants do, since the better of the two scores is considered) needs to register again for Session 2, even after completing Session 1's registration. Historically, Session 1 registration has opened in the November-December window ahead of a January exam, and Session 2 registration has opened in the January-February window ahead of an April exam — but exact dates shift from year to year, and the only reliable source is the official NTA JEE Main website at the time of application.

Documents to Have Ready Before the Form Opens

  • A recent passport-size photograph and signature, scanned separately, meeting the exact size and file-format specifications published on the portal — these are checked automatically and a mismatch is one of the most common rejection reasons.
  • Class 10 and Class 12 (or equivalent) mark sheets and certificates, for academic detail verification.
  • A valid, active email address and mobile number that the candidate personally controls, since OTPs and all official communication go through these — not a parent's number that might change.
  • Category certificate (SC/ST/OBC-NCL/EWS) if applicable, issued in the correct, currently valid format.
  • PwD certificate, if applicable, for benchmark disability categories eligible for reserved seats and exam accommodations.
  • Aadhaar or an accepted alternate ID, per the specific requirements published for that year's cycle.

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The Correction Window: A Safety Net That Only Works If Used

NTA typically opens a short correction window after the main registration period closes, allowing candidates to fix specific fields in their submitted application. This exists precisely because errors are common — but it only helps a candidate who actually reviews their submitted form carefully during that window, rather than assuming the initial submission was correct. Treating the correction window as optional, rather than as a mandatory second check, is one of the more preventable mistakes candidates make.

Common Mistakes to Avoid

  • Uploading a photo or signature that doesn't match the exact specified dimensions, background, or file size — this is consistently the most common technical rejection or correction-needed reason.
  • Using a parent's or relative's phone number or email that isn't reliably accessible when OTPs or exam-city/date communications arrive.
  • Selecting exam cities without considering realistic travel and accommodation logistics — city preference isn't guaranteed, but a poorly considered list of choices narrows the odds of a convenient allotment further.
  • Skipping the correction window entirely, assuming the first submission was error-free, instead of using it as a mandatory final review.
  • Waiting until the last day of the registration window to begin the process, leaving no buffer for a technical glitch, a missing document, or a portal slowdown that's common near deadlines.

Expert Tips from BuzzyBrains Academy Faculty

Founder Dilip Sah (IIT Kanpur alumnus, JEE AIR 400, 25+ years of mentoring experience) has seen avoidable registration errors cost students real stress in exam season, and BuzzyBrains Academy builds a few habits around this specifically:

  • Students are guided to prepare every document and photo specification at least two weeks before the registration window is expected to open, based on the prior cycle's typical timing, rather than reacting once it opens.
  • A mentor-reviewed checklist is run against the submitted form during the correction window, catching mismatches the student may have missed on their own.
  • Families are directed only to the official NTA JEE Main portal for dates and requirements, since third-party sites and forwarded messages are a common source of outdated or incorrect information.