How to Change Email ID on GST Portal? 2026 Guide

Why Should You Change the Registered Email ID and Mobile Number on GST Portal?

You should update your GST-registered email ID whenever the existing address is no longer used by the authorized person. The GST portal uses registered contact details for important communications and authentication requirements. Updating your email ID and mobile number can help you:

• Receive GST portal notifications and acknowledgements.
• Receive OTPs required for applicable GST services.
• Track important GST registration and amendment communications.
• Receive information sent to the primary authorized signatory.
• Avoid missing important messages sent to an inactive email address or mobile number.

GSTN’s registration system uses the email ID and mobile number of the primary authorized signatory for GST communications.

How to Change Email ID in GST Portal?

You can change the GST-registered email ID through the Amendment of Registration Non-Core Fields option. The exact tab you use depends on whether the contact details belong to an authorized signatory or a promoter/partner who also acts as the authorized signatory.

Follow these steps to update your GST email ID online.

Step 1: Log in to the GST Portal

Visit the GST portal and log in using your valid GST credentials.

Step 2: Open Non-Core Field Amendment

Go to:

Services → Registration → Amendment of Registration Non-Core Fields

GSTN provides this option for changing information classified as non-core registration details.

Step 3: Open the Authorized Signatory Tab

If you need to change the email ID of an authorized signatory, open the Authorized Signatory tab.

Find the relevant person and click Edit to update the contact information.

Step 4: Enter the New Email ID and Mobile Number

Enter the new email ID and mobile number in their respective fields. Check both details carefully before saving the amendment.

GSTN specifically allows taxpayers to update the mobile number and email ID through the authorized signatory section.

Step 5: Verify the New Contact Details

After saving the updated details, the GST portal will display the OTP verification requirement.

For an authorized signatory update, GSTN states that a common OTP is sent to the updated email ID and mobile number. The OTP remains valid for 10 minutes.

Enter the OTP and complete the verification process.

Step 6: Submit the Amendment

After verifying the updated details, complete the Verification section.

Select the authorized signatory, enter the required place details, and submit the amendment using a Digital Signature Certificate (DSC) or Electronic Verification Code (EVC), as applicable.

GSTN’s official procedure requires authentication through DSC or EVC before submitting the non-core amendment.

Step 7: Check the Amendment Status

After successful submission, GSTN automatically approves the non-core amendment without tax officer processing.

The portal also sends an acknowledgement and ARN information to the registered email ID and mobile number.

Is Changing Email ID on the GST Portal a Core or Non-Core Amendment?

Changing the registered email ID and mobile number is handled through a non-core amendment on the GST portal. GSTN states that non-core amendments do not require tax officer approval and become automatically approved after successful submission.

This differs from core amendments, which can require processing and approval by the jurisdictional tax officer.

What Happens After Changing the GST-Registered Email ID?

After successful submission, the GST portal updates the registered contact information and automatically approves the non-core amendment.

GSTN sends the amendment acknowledgement and ARN information to the registered email ID and mobile number. Future GST communications directed to the primary authorized signatory will use the updated contact details.

How to Change GST Email ID When Promoter and Authorized Signatory are the Same?

If the promoter or partner is also the primary authorized signatory, update the contact details through the Promoter/Partner tab. Follow these steps:

1. Log in to the GST portal (gst.gov.in).
2. Go to Services → Registration → Amendment of Registration Non-Core Fields.
3. Open the Promoter/Partner tab.
4. Click Edit for the relevant person.
5. Enter the new email ID and mobile number.
6. Save the updated details.
7. Enter the OTPs sent to the new email ID and mobile number.
8. Complete the verification process.
9. Submit the non-core amendment.

GSTN states that the updated details automatically reflect in the Authorized Signatory tab when the promoter or partner and authorized signatory are the same person.

How to Change the Primary Authorized Signatory on the GST Portal?

Changing the email ID is different from replacing the primary authorized signatory. If you need to replace the person acting as the primary authorized signatory, GSTN provides a non-core amendment process for adding or changing authorized signatory details. The exact route depends on the registration’s existing promoter, partner, and authorized-signatory structure. 

Where the existing promoter or partner is the only authorized signatory, GSTN’s guidance provides for adding the new authorized signatory first. The taxpayer can then make the new person the primary authorized signatory through the applicable non-core amendment.

This process is relevant when the business changes the person responsible for GST portal communications and filings.

Common Problems While Changing GST Email Address and Mobile Number

Some taxpayers may face verification or portal-related issues while updating their GST contact details. The following solutions can help resolve common problems.

Problem	What to check
OTP not received	Confirm that the new email ID and mobile number are active and check your email spam folder.
OTP verification fails	Request a fresh OTP and enter it within the permitted validity period.
Email ID cannot be edited	Open the applicable Authorized Signatory or Promoter/Partner tab and select Edit.
Primary authorized signatory needs replacement	Follow the applicable non-core amendment process for adding and changing the authorized signatory.
Amendment does not appear immediately	Check the amendment status and allow the portal to complete the submission process.
Pending REG-32 application	Check whether a REG-32 application is pending before attempting to amend the registered contact details.
DSC submission fails	Check that the applicable DSC is valid and available for GST portal authentication.
EVC verification fails	Ensure the authorized signatory’s registered mobile number can receive the required OTP.

How to Change Email ID or Mobile Number in GST Portal Without Login?

If you cannot log in to the GST portal because the registered email ID or mobile number belongs to a former consultant, employee, or unavailable authorized signatory, you cannot use the normal non-core amendment process. GSTN provides a separate procedure for cases where the Primary Authorized Signatory is untraceable.

This situation can occur when a consultant or former employee used their own contact details during GST registration and did not hand over the login credentials. It can also arise when the existing authorized signatory has left the business or is no longer available.

In such cases, the taxpayer needs to approach the jurisdictional tax officer and provide documents that establish the business details associated with the GSTIN. GSTN’s documented process works as follows:

1. Identify the jurisdictional tax officer: Check the GST Registration Certificate for the applicable jurisdiction. GSTN also states that the jurisdiction can be checked through the My Profile section when portal access is available.
2. Submit business documents: Provide valid documents that establish the business details associated with the GSTIN.
3. Establish your authority: The tax officer verifies whether the person requesting the change is recorded as a stakeholder or authorized signatory for the GSTIN.
4. Submit supporting proof: The tax officer uploads sufficient supporting documents on the GST portal to authenticate the request.
5. Provide new contact details: The tax officer enters the new email ID and mobile number provided by the taxpayer.
6. Reset the GST portal password: After uploading the supporting documents, the tax officer resets the password for the GSTIN.
7. Receive new login credentials: GSTN communicates the username and temporary password to the new email address entered by the tax officer.
8. Complete first-time login: Use the First Time Login option on the GST portal with the username and temporary password received on the updated email ID. The portal then requires you to create new login credentials.

This process allows the business to regain access when the existing GST credentials or registered contact details are controlled by an unavailable person. The tax officer verifies the request and updates the contact details before resetting access to the GST account.

GST Email ID Change: Important Points to Remember

Keep these points in mind before submitting your GST email ID amendment:

• Use an active email ID that the authorized person can access.
• Enter the mobile number carefully before submitting the amendment.
• Complete the OTP verification for the updated contact details.
• Check the correct tab before editing the information.
• Use the applicable DSC or EVC authentication method.
• Save the acknowledgement and ARN after successful submission.
• Confirm that the updated details appear correctly after the amendment.

GSTN confirms that the non-core amendment process automatically updates the registration information after successful filing.

GST Email ID Change vs GST Registration Amendment

Changing an email ID or mobile number does not require the same process as changing core registration information. GSTN categorizes different registration details as core or non-core fields, and the applicable amendment process depends on the information being changed.

Particulars	GST Email ID Change	Core GST Registration Amendment
Amendment type	Non-core	Core
GST portal option	Amendment of Registration Non-Core Fields	Amendment of Registration Core Fields
Tax officer approval	Not required for non-core amendment	May be required
Processing	Auto-approved after successful filing	Subject to applicable processing
Example	Email ID or mobile number	Certain principal business details

GSTN’s official guidance confirms that non-core amendments are automatically approved after successful submission.