Changing your payroll bank account is just a few clicks in QuickBooks Online (QBO).
Let me show you how:
Click the Gear icon at the top.
Look for the Bank Accounts section.
Use the Pencil icon ✎then select Update.
Choose Add new bank account.
If you bank with one of the 8 banks listed, select the bank and enter your online banking user ID and password. Otherwise, search your bank name or select Enter bank info manually. Enter your routing and account number, then select Save.
Once done, we'll verify your new account with a test transaction within 2-3 business days. For more details about this, see Step 5 on this article: Change your payroll bank account.
As for transferring funds from your business checking to your newly formed payroll checking account, you can do this by doing a transfer online. You can also connect your bank account to online banking to have the transactions be automatically downloaded to your QBO account. For more details, see this resource: Connect bank and credit card accounts to QuickBooks Online.
If you have more questions about managing your payroll in QBO. Just reply in the comment section and I'll get back to you as quickly as I can. Have a great day.