Welcome to the Community, @info-ahns.
You're referring to inviting an accountant in QuickBooks Online (QBO), correct? If so, the steps to do this are pretty easy. Here's how:
To learn more about the process, consider checking out this article: Invite or remove an accountant.
Please know that I'm only a few clicks away if you have any other questions or concerns. I'll be here to help. Have a good one!
At the moment we're unable to add users/accountants in the QuickBooks Self Employed version. Adding and inviting an accountant in QuickBooks is currently available in the QuickBooks Online Simple Start, Essentials, and Plus versions.
You'll have to download your data through excel and manually send it to your accountant. Here's how to export reports and transactions port:
To download the transactions:
You can then save the data and send it to your accountant via email or print the report.
To learn more about exporting transactions in QuickBooks Self Employed, you can check this link Export transaction and get reports in QuickBooks Self-Employed.
Feel free to comment below if you have more questions. I'll be around to help you. Have a nice day!