I appreciate you reporting this to us and providing complete information about your concern, Morgo.

Please know that using your personal and business transactions will not affect connecting your bank to QuickBooks. However, it is also not advisable.

If I may ask, are you experiencing error 106? If so, I recommend reaching out to our live phone support team. They can further investigate your account and provide possible solutions for this issue. Here’s how to contact them:

1. Go to the Help icon in the top menu
2. Select the Search tab and enter your concern.
3. Click the Contact Us button and choose either Chat or Callback to connect with us.

I'd also suggest checking the support hours to know the best time to contact them at your convenience.

If you are experiencing a different bank error, please specify the issue. This will help me provide you with an accurate resolution.

For more details, please refer to this article: Mixing business and personal funds in QuickBooks Online.

We will keep this thread open for any further questions, and we are here to help.