Is there a limit on the number of bank accounts or credit cards that I can connect to QuickBooks?

Welcome to the Community, @info-herzelspeec. Let me share some insights about connecting bank accounts in QuickBooks Self-Employed.

There's no upper limit to the number of bank accounts you can add to one QBO company file. 

When you connect your account to QuickBooks Self-Employed, your recent transactions will be downloaded automatically. This allows you to skip manual data entry. QuickBooks also categorizes them for you. All you have to do is approve the work.

If you wish connect to an online bank or credit card account. Follow the section based on where you're using QuickBooks Self-Employed.

1. Select the profile ⚙ icon and then select Bank accounts.
2. In the search box, enter the name or URL of your bank. Then select Continue. If you've already connected an account before, select Connect another.
3. Enter the sign-in info you use for your bank's website.
4. When you’re ready, select Connect securely.

In addition, QuickBooks Self-Employed now automatically downloads the latest banking transactions.

Furthermore, learn about Schedule C categories and how to categorize transactions in QuickBooks Self-Employed.

Don't hesitate to leave a comment below if there's anything else I can help you with today. I'm always right here to help you out.