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# 9.2 Register Account Connection

<figure><img src="/files/RhDMMyCTmJ1fbcmzOfQi" alt=""><figcaption></figcaption></figure>

After the e-invoice supplier, for example Viettel, creates an account for the client, enter the connection account information on this screen.

1. Enter **Account User**.
2. Enter **Password**. The default initial password format is **\[TIN] + 111111a\@A**.
3. Click **Save** to store the connection information.

> **Example:** If the company's Tax Identification Number (TIN) is 0312345678, the default initial password is **0312345678111111a\@A**.

> **Note:** TIN is the company's Vietnamese tax identification number. If the password is changed on the provider portal, update the password in SmartBooks before issuing invoices.