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FY 2025-26 · AY 2026-27
Updated August 2026

How to Change Registered Mobile Number or Email ID on the GST Portal?A Comprehensive Guide for FY 2025-26

Learn the step-by-step process to update your registered mobile number or email ID on the GST portal for FY 2025-26. Ensure your contact details are current to receive important GST notifications.

Table of Contents
1

Authorised Signatory is the Same as Partner/Promoter


2

Different Authorised Signatory or Multiple Signatories


3

FAQs on Changing GST Portal Contact Details

Authorised Signatory is the Same as Partner/Promoter

Follow these steps if the authorised signatory is the same person as the partner or promoter.

  1. Log in and Access Amendment

    Begin by logging into the GST portal to access the amendment section.

    • Log in to the GST portal using your credentials.

    • Navigate to Services -> Registration -> Amendment of Registration Non-core Fields.

    • Ensure you have access to the Promoter/Partners tab.

  2. Update Contact Details

    Modify the mobile number or email ID as needed.

    • Select the 'Promoter/Partners' tab and click 'Edit' next to the authorised signatory.

    • Enter the new mobile number or email ID.

    • Click 'Save' to store the changes.

  3. Verification Process

    Complete the verification to finalize the update.

    • An OTP will be sent to the updated mobile number and email ID.

    • Enter the OTPs received to verify the changes.

    • Proceed to the 'Verification' tab and submit with DSC/E-signature/EVC.

  4. Confirmation and ARN

    Receive confirmation of your update.

    • You will receive a confirmation message with an ARN number.

    • Track the status of your application using the ARN.

    • A 'Changes Approved' message confirms the update is successful.

Ensure all details are correct before submission to avoid delays.

Different Authorised Signatory or Multiple Signatories

Steps to update contact details when the authorised signatory differs from the promoter or there are multiple signatories.

  1. Add New Authorised Signatory

    Introduce a new authorised signatory with updated contact details.

    • Log in to the GST portal and access the amendment section.

    • Navigate to the 'Authorised Signatory' tab and click 'Add new'.

    • Enter the details of the new authorised signatory.

  2. Verification of New Signatory

    Complete the verification for the new authorised signatory.

    • Save the new signatory details and proceed to the 'Verification' tab.

    • Submit the form with DSC/E-signature/EVC.

    • Wait for 15 minutes before proceeding to the next step.

  3. Update Primary Signatory

    Change the primary authorised signatory to the new one.

    • Log back into the GST portal and access the amendment section.

    • Deselect the previous signatory and select the new one as primary.

    • Verify the contact details with an OTP sent to the new number/email.

  4. Final Confirmation

    Receive confirmation of the update.

    • Submit the final verification with the updated details.

    • Receive an ARN to track the application status.

    • A 'Changes Approved' message confirms the update.

Ensure the new signatory's details are accurate to avoid any issues.

FAQs on Changing GST Portal Contact Details

What is the ARN number used for?

The ARN (Application Reference Number) is used to track the status of your application on the GST portal. It is generated after you submit your amendment request.


How long does it take for changes to be approved?

Typically, changes are approved within 3-5 business days. However, it may take longer if additional verification is required.


Can I update both mobile number and email ID simultaneously?

Yes, you can update both the mobile number and email ID in a single amendment request. Ensure both are verified with OTPs.


What if I don't receive the OTP?

If you do not receive the OTP, check if the entered contact details are correct. You can request a resend of the OTP from the portal.


Is there a fee for updating contact details on the GST portal?

No, there is no fee for updating your registered mobile number or email ID on the GST portal.


Can I change the authorised signatory details multiple times?

Yes, you can change the authorised signatory details multiple times. However, each change must be verified and approved separately.


What documents are required for changing the authorised signatory?

Typically, no additional documents are required for changing contact details. However, ensure the new signatory's details are accurate and verified.


Will I receive a notification once the changes are approved?

Yes, you will receive a notification on your updated email ID and mobile number once the changes are approved.


Can I revert the changes if needed?

Yes, you can revert the changes by submitting a new amendment request with the previous details.


What should I do if my application is rejected?

If your application is rejected, review the rejection reason, correct any errors, and resubmit the amendment request.

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