NTA (National Testing Agency) made a public announcement on the official website about the JEE Mains Registrations 2026 on 31st October 2025. The JEE Mains Registration window was live on 31st October 2025. NTA also mentioned that 27th November 2025 (up to 9:00 PM) is the last date to fill the registration form for JEE 2026 Mains. Candidates appearing for the JEE Mains in 2026 must complete the online registration procedure during this period to ensure there are no delays. Essential documents vital for submitting the JEE Mains 2026 registration form are a passport-size photograph, signature, Class 10th marksheet, caste certificate, valid ID proof and PwD certificate (if applicable).
Submission of improper documents or making a significant mistake while filling up the registration form will lead to the disqualification of your candidature status. If you’re appearing for a competitive exam like JEE Mains, then you must ensure that you don’t commit any mistakes while registering online. In this informative blog, we will discuss the most common errors that JEE aspirants must avoid at all costs. Strict adherence to these important instructions and guidelines will help you prevent unwanted circumstances during the submission of the JEE (Joint Entrance Examination) Mains 2026 application form.
Join this free JEE Prep Group to Get Free Study Material, Preparation Strategy by Toppers, Latest Updates and More!
JEE Mains 2026: Mistakes To Avoid During JEE Main Form Filling Process
Filling out the registration form of the JEE Mains 2026 is a crucial phase for the appearing candidates. Every aspirant must carefully read the instructions on the official website of NTA. The official notification consists of all the essential information like the registration start date, last date, exam date, answer key date, result date and the document checklist. Negligence in reading the notification from the official platform will result in multiple challenges during the registration procedure.
Thus, it’s vital to read all the rules and regulations carefully. This important step will ensure that you don’t make any mistakes in the JEE Mains form 2026. If you still think that prior information about the common mistakes to avoid during JEE Main Form Filling will keep you safe, then here’s the complete information for you. Note down these mistakes and also learn about the ways to avoid them for the successful submission of your application form.
False/Mismatch Personal Information
Necessary details like your complete name, date of birth, parent’s names, permanent and correspondence address must be correct. All your personal and academic details must match the attached documents. After filling up the application form, you’re responsible for checking every particular detail. Carefully review that the spelling of your name, parent’s name, DOB, address, etc, is accurate and matches your official documents like Aadhar Card, 10th Certificate and caste certificate.
Inaccurate Academic Qualifications
NTA has a specific section to enter the academic details from the 10th and 12th grade examinations. Your minimum aggregate score should fall under the basic eligibility criteria for the Class 10th and Class 12th grades. Enter the correct percentage from both the examinations in the JEE Mains registration form 2026. Your 10th-grade marks should be exactly similar to your SSC marksheet or passing certificate.
Other Person’s Contact Information
Regular updates are sent to the registered mobile number and email address. If you enter another person’s contact information, you will miss out on regular updates. Thus, fill in your personal 10-digit registered phone number with a valid email address in the application form. Any kind of OTP and latest announcements will be sent on that particular communication platform.
Mismatch Information on Aadhar Card & Other Documents
This is undoubtedly one of the most common mistakes to avoid during JEE Main Form Filling 2026. Incorrect or different spelling in all your important documents will land you in major trouble. The problem will be more alarming if the spelling of your name doesn’t match exactly with your documents. Hereby, cross-check the spelling of your full name, parent’s name, permanent and correspondence address, etc, in the documents and the JEE Mains application form. Every piece of information must match in all the documents.
Incomplete or No Review
Every year, there are a few candidates who submit the application form without reviewing it. This incident is mainly common amongst the candidates who submit the online registration form on the last date. You can catch spelling mistakes, inaccurate educational qualifications, etc, while reviewing the application form. This stage will open the doors to correct the JEE Mains registration form and will prevent you from facing rejection or disqualification.
Selecting the Wrong Reservation Category
A crucial factor that is completely non-negotiable. Clearly, it comes under important mistakes to avoid during JEE Main Form Filling. Choosing the wrong category from SC/ST/OBC, attaching wrong or fake documents, can cause unnecessary issues. Once you go through the official guidelines, check if you have an updated caste certificate. It’s mandatory to renew the reservation certificate every year. Lastly, before submitting the application form, you will have to check if all the information is accurate on the caste certificate.
Not Paying the Application Fee
At times, students face technical glitches or server issues, due to which they’re unable to complete the transaction for the application fee. This will address your application form as incomplete. Under such circumstances, it should be your priority to make the full payment according to your reservation category for the JEE Mains application form 2026. While paying the registration fees, check that you have a strong internet connectivity, have sufficient balance and are using a suitable mode of payment for seamless transactions.
Not Checking the Test Centre
Often, candidates choose any random test centre due to a lack of time or hurry. As a result, they have to travel for long hours before the actual exam or the exam day to reach the test centre. This results in extreme stress and tiredness. Avoid this mistake by carefully checking all the available test centres in the application form. Pick a test centre that is nearest to your current address. Furthermore, this will save you from spending extra time, money and effort. Consequently, you will report timely to the JEE Mains exam centre.
Submitting Wrong Documents
Another popular reason for rejection of the JEE Mains application form. NTA will not accept your application form if you submit a blurred passport-size photograph, signature. Moreover, submitting the necessary documents not under the specific size, dimension, and format can also cause problematic issues. To prevent these mistakes, go through the official instructions. Check the size, dimension and format for every document. Scan every document and then upload those documents in accordance with the mentioned guidelines.
Selecting Passed or Appearing Option
In a hurry, some candidates choose the wrong option out of passed or appearing in the online application form. Only those candidates who have successfully cleared the 10+2 examination can opt for the “Passed” option. The “Appearing” option is applicable for the candidates who are giving the 12th-grade examination in the same year. You can also choose “Appearing Option” if you’re giving the improvement exam for the Class 12th grade examination.
JEE Mains 2026: List of Important Documents
| Key Particulars | Size | Dimension | Format |
| Valid Government ID Proof | 10 kb to 300 kb | – | |
| Class 10 Passing Certificate/Marksheet | 10 kb to 300 kb | – | |
| Caste Certificate | 10 kb to 300 kb | – | |
| Passport-Size Photograph | 10 kb to 300 kb | JPEG/JPG | 3.5 cm x 4.5 cm |
| Signature | 10 kb to 50 kb | JPEG/JPG | 3.5 cm x 1.5 cm |
| UDID Card | 10 kb to 500 kb | – |
Final Words
Those candidates who are appearing for the JEE Mains Exam in 2026 should have a detailed understanding of the mistakes to avoid during JEE Main Form Filling. If you already have a checklist for don’ts, then you won’t face any issues when you fill out the application form via the official website. Entering wrong or irrelevant information will lead to rejection of your candidature.
As a result, your preparation will go in vain. Henceforth, check all the instructions before you start the registration process. Collect the documents in advance and check that your details are similar on all the documents. Stick to the guidelines and fill the form before the last registration date to avoid technical issues, server glitches, payment failure, network congestion, etc.
Click Here to Enroll to JEE 2026 Course!
Frequently Asked Questions
Which documents are mandatory for JEE Mains 2026?
A passport-size photograph, your signature, Class 10th certificate, a valid government ID proof, UDID Card (if applicable), reservation certificate (if applicable) are important documents for the JEE Mains 2026 registration. Submit all the documents in an acceptable dimension, format and size.
What will happen if I submit the wrong documents for JEE Mains 2026?
Uploading wrong, improper or false documents will immediately lead to rejection of your application form. Check the list of mandatory documents from the official portal. Gather them in advance and make sure that the format, dimension and size are correct.
Is it necessary to review the JEE Mains form before submitting it?
It’s important to double-check the entire application form before the final submission. While reviewing the application form, you must thoroughly check that all the details are correct. There should be no spelling mistakes, wrong information, as it will result in disqualification.
When does NTA reject a JEE Mains application form?
Mismatch information in Aadhar card and Class 10th documents, incorrect documents, wrong academic records, blurred photograph or signature, entering someone else’s phone number or email address are a few common reasons due to which NTA will automatically reject your online registration form.
Can I re-upload the correct documents for JEE Mains 2026 via the correction window?
No, there is no option to upload the documents again on the JEE Mains official website. During the correction window, you also cannot edit your mobile number, email address, permanent residential address, correspondence address and your photograph.
