Hello there, joppelt08.
I'll be glad to provide you with the steps on how you can select an account to automatically populate the expense account when writing a check in QuickBooks Online (QBO).
You'll want to set up a default account for your vendor so it will automatically show up when you create an expense transaction for that specific vendor. Let me share the steps below.
- Go to the Expenses menu.
- Choose Vendors.
- Select the vendor you want to add an account.
- Click Edit, and you'll be routed to the vendor's information page.
- Scroll down to the Accounting section.
![image_480.png image_480.png](https://quickbooks.intuit.com/learn-support/image/serverpage/image-id/96779i02E26866D01BE44C/image-size/large?v=v2&px=999)
- From the Choose account dropdown, select the Default expense category.
- Then hit Save.
Once done, you can now create an expense transaction for that vendor, and the account you choose will automatically populate the transaction.
![image_720.png image_720.png](https://quickbooks.intuit.com/learn-support/image/serverpage/image-id/96781i47BBAD5C47F9424C/image-size/large?v=v2&px=999)
I'm leaving you this article to help you track and manage your expenses in QuickBooks: Enter Expenses, Pay Bills, Write Checks, and Add Suppliers.
Feel free to come by anytime if you have other questions or concerns. I'm always happy to help.