Thanks for joining the Community, Nick99.
 

Online Bill Pay is compatible with many banks, including BMO Harris. You can add your bank account anytime you're ready to.
 

Here's how:
1. Use your Gear (⚙️) icon, then go to Account and Settings.
2. Choose Bill Pay.
3. Click Bank Accounts.
4. Hit Set up new bank.
5. Pick Sign in to your bank and press Next.
6. Elect the appropriate financial institution.
7. Enter your login information, then choose an account.
8. Input the following:

• Account type
• Legal name
• Link to QuickBooks account - Be sure to pick a matching Chart of Accounts account. If there isn't a match, create one.
• Let admins pay bills with this account - There will be three options to choose from.

9. Select Next to complete the process.
 

Now you'll be prepared to pay your bills electronically.
 

You can find more details about using Online Bill Pay in our What is Online Bill Pay? resource.
 

If there's any additional questions, I'm just a post away. Have a lovely day!