The electronic invoicing account has been locked. The issue needs to be addressed at the point where the error occurred. If the tax authority's Electronic Invoice Portal reports being locked after multiple incorrect password attempts, stop trying different passwords and use the relevant function. Forgot password On the portal, if the message is "account does not exist," "disabled," or simply the vendor's invoicing software is experiencing errors, resetting the e-invoice portal password may not resolve the issue.
Before proceeding, write down the message verbatim, the system name, and the type of account you are using. These three pieces of information will determine whether you should recover your password, ask an administrator to check your permissions, or contact support.
Before resetting your password, identify the system and error messages.
Only proceed with the "unlock" option when the e-invoice portal actually notifies you that the account has been locked. The tax authority's portal and the business invoicing software used may have their own accounts, permissions, and error messages. The table below helps you choose the first step before trying again.
| The signs you see | First check | Solution |
|---|---|---|
| The e-invoice portal reports being locked after multiple incorrect entries. | Is the portal address correct and the login name correct? | Stop trying passwords; switch to Forgot password. |
| Incorrect username or password, not yet reported as locked. | Information has been provided, keyboard and password are automatically filled in. | Perform a controlled check once; if unsure, use Forgot Password. |
| The account does not exist or is disabled. | Is this the primary account or an authorized user? | Please have the administrator verify the status; contact support if it's the primary account. |
| The portal page failed to load before the login screen. | Address, network, browser, system notifications | Troubleshooting previous access issues; there is insufficient evidence to conclude that the account has been locked. |
| I can log in to the e-invoice portal, but the software is still malfunctioning. | Software account, permissions, and connection information have been saved. | Troubleshoot using the software or contact the vendor. |
Re-enable access to the E-Contract Portal when your account is reported as locked.
This is the process for recovering your password to log into an existing account; it does not require you to register a new account. When the gate shows as locked after multiple incorrect attempts, stop trying the password and follow the six steps below. The interface and authentication requirements may change; always prioritize the instructions displayed on the gate.
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Step 1: Open the correct Electronic Invoice Portal of the tax authority.
Self-entry hoadondientu.gdt.gov.vn In your browser, check the domain name before entering any information; if the page doesn't load, troubleshoot the connection before concluding that the account is locked.
Completion sign: You see the portal page and the Login button.
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Step 2: Select Log in, then Forgot password.
Open the Login window, select Forgot password. Do not continue guessing the password and do not select the registration stream for using electronic invoices.
The Login window on the Tax Authority's Electronic Invoice Portal, captured on October 7, 2026. Select "Forgot password" to open the recovery form. Completion sign: The "Forgot Password" form appears.
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Step 3: Prepare the digital signature according to the method your business is using.
If used USB Token, Plug in the token and check if the device is recognized by the machine. If the port requires an HDDT Plugin, download and install it from the Support section on the port itself. If using remote digital signature, No need to plug in the USB Token; prepare the remote authentication method that your unit has registered and follow the displayed port flow.
Completion sign: The signing method you are using is ready; there are no missing plugin errors or digital signature not being recognized.
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Step 4: Fill in your login name and email address on the recovery form.
For the primary business account, enter the tax identification number in the box. Username If that's the username already assigned, fill it in. Email Follow the instructions displayed on the form and check mailbox access permissions before submitting. If the portal reports a mismatch in information, compare the registered account and email address or contact official support. Authorized users must verify their login name with the administrator.
The "Forgot Password" form on the Tax Authority's Electronic Invoice Portal, photographed on October 7, 2026. Please check your username and email address before choosing a suitable signing method. Completion sign: The username and email address were verified before sending.
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Step 5: Submit the request and verify using the correct type of digital signature.
With USB Token, select Recover password Enter your PIN in the signing window when prompted by the port; keep your PIN confidential. For remote digital signatures, select the stream. Password Recovery (Remote Signature) If the portal appears and authentication is complete via your signing service, read the result message; if there are errors, stop here and handle the plugin or digital signature error correctly.
Completion sign: The portal confirms that the password reset request has been received.
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Step 6: Receive your new password and log in to verify.
Open the mailbox you provided in step 4 or the designated gateway mailbox; check for spam as well. Only follow emails that belong to the official procedure. Use the new information to log back into the gateway, disable the old password automatically filled in by the browser, and then try the function you need to use.
Completion sign: You've successfully logged into the correct account and see the appropriate permissions. If you don't have an email or the gateway is still rejected, see the troubleshooting section below.
There's no basis for promising that every account will automatically open after 15 or 30 minutes. If the issue is with a plugin, digital signature, or email, address the bottleneck before resubmitting the request.
Recovery failed: check plugins, email, and account type.
A failed password recovery request should be diagnosed according to the message at the stopped step. Don't keep sending the same request without knowing whether the error lies in the signing component, registration information, or user permissions.
The port requires the HDDT Plugin, but the computer doesn't recognize it.
Verify that you have downloaded the correct installer from the Support section on the E-Board, and have installed and launched it according to the portal's instructions. If using a USB Token, check that the device and digital certificate are still recognized by the machine; if using remote digital signatures, check that the correct authentication method is being registered. The message "certificate not found" is different from "plugin not found": you need to read the error correctly before reinstalling.
If your company's computers have software installation restrictions, ask the IT department for support. Do not download installation files from unknown sources or ask others to send you passwords/digital signatures to perform tasks on your behalf.
No email received, or account reported as non-existent.
First, check the mailbox you just declared on the form (or the designated gateway mailbox), spam folder, and the business's email access permissions. If the identification information doesn't match, compare the login name and account type. For secondary users, the administrator needs to confirm that the account still exists and has permissions. For the main account with an unusual status, use the official support channel of the tax authority to verify; do not create a new account just to bypass the notification.
I've accessed the e-invoice portal, but the invoicing software is still showing an error.
This indicates that port access and software status need to be checked separately. Verify the user in the software, permissions, password, or connection information stored in the software after changing the port password. If the configuration cannot be managed, forward the error message and time to the software vendor verbatim; do not continue resetting the port account once the port has logged in normally.
Can I simply check an invoice without being logged in?
You can have a separate lookup process without waiting for your account to be restored. According to the instructions from the Tax Department above. Government Electronic Information Portal, Even without an account, users can still select the electronic invoice lookup function and enter the required invoice information. This is a way to check a specific invoice when you have sufficient data; it does not replace the right to view and manage invoice history in your business account.
If the goal is to perform a lookup after regaining access, see Instructions for looking up invoices on the Tax Authority's Portal. If it's necessary to process all the data in the business account, you'll still need to restore login access and verify permissions.
After logging in again, prevent the error from recurring in the Gateway and software.
Complete the recovery by checking which user has administrator privileges, the email address receiving notifications, and the software connection. This helps to quickly identify the source of the error next time without trying multiple passwords on different systems.
- Record the primary account administrator's contact information and the registered email address; ensure the business still has access to that email.
- Use a separate user account and assign appropriate permissions when the system supports it; avoid sharing a password through channels that are difficult to control.
- After changing the gateway password, check that authorized connections are still holding the old login credentials and update them according to internal procedures.
- Record the error message, time, system, and step involved so that administrators or support staff can make an accurate diagnosis.
Frequently Asked Questions about Locked Accounts
How long does it take for a locked electronic invoicing account to be unlocked?
There is no fixed, verified automatic unlocking time for all cases. If the gate shows as locked after multiple incorrect entries, proactively use the "Forgot Password" feature and monitor system notifications, instead of waiting for a 15 or 30-minute window.
Are the e-invoice portal account and the invoicing software account the same?
Do not default to the same account. Identify where the error is appearing: if you can log in to the portal but the software is still malfunctioning, check the user, permissions, and connection on the software or contact the vendor.
