Can I add my personal checking account to my QuickBooks business account?

Good evening, @apbp-sales-gmail. 

Congrats on making your first post here in the Community. I can answer your question about adding your personal checking account to your QuickBooks Business account. 

Yes, you can add your personal checking account to your QuickBooks Online account. Here's two guides to help you get this account added: 

• Add an account to your chart of accounts 
• Connect bank and credit card accounts

However, we recommend not to mix personal and business funds within the same QuickBooks account. Review this article for more details: Mixing business and personal funds. 

I hope this helps answer your question. Don't hesitate to come back if you need me again. Have a great day!