I'm here to help connect your business account to QuickBooks Online, @suziemcdanielcer.
If you want to swap the two accounts, you can disconnect your personal account and connect your business account.
Now that your accounts are connected, QuickBooks Online will automatically download transactions so you don't have to enter them manually. All you have to review and categorize the downloaded transactions.
Please let me know if you have other queries in connecting accounts in QuickBooks. We're 24/7 open to help you. Have a pleasant day.