> For the complete documentation index, see [llms.txt](https://local.docs.ssaudit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://local.docs.ssaudit.com/english-1/e-invoice/9.3-user-register.md).

# 9.3 User Register

<figure><img src="https://632035940-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MS6wMckMyiqOiAIvWnY-1703796690%2Fuploads%2Fgit-blob-54dcdca7eedde9de334bbfc622f194f487e17f74%2Feinvoice-user-01.png?alt=media" alt=""><figcaption></figcaption></figure>

Create a connection between Smartbooks account with Supplier account (Example: Viettel)

The supplier can create a sub-account for setup access right. So Smartbooks can assign Smartbooks account with each sub-account (Example: Viettel sub-account)