How would I record a canceled check that I accidentally deposited? The deposit was returned in full so there was ultimately no change in balance, less a bank fee.

It's nice to see you here in the Community forum, userchristopher.

I'm here to share information with you on how to record a returned payment in QuickBooks Online (QBO). 

You can either write a check or use a Journal entry. As this process is complicated, I recommend contacting your accountant to help decide which method best suites for you. If you don't have one, you can find an accountant near your place through this link: https://quickbooks.intuit.com/find-an-accountant/.

For more information about recording the returned payment, see the below articles:

• Record a returned or bounced check customer check using an expense
• Record a returned or bounced customer check using a journal entry

Please know that you're always welcome to post if you have any other concerns. Wishing you and your business continued success.