Hi there, @stevemelanie2002. Let me address your concern about adding more than one account under one sign in.
For QuickBooks Self-Employed, you can only have one account per email address. This is the reason why there's no option to add a second account when logged in to the existing one.
When creating a new account, you’ll need to use a different email address. Then click the Create a new account link and follow the steps to create a new account.
You can also check this link for more details about QuickBooks Self-Employed overview.
If you have any further questions with any transactions in QuickBooks Online, please let me know and I’ll do everything I can to help here in the Community!
