To show the categories (expense accounts) on your check stubs is a great idea, @Brandie.
Currently, this option is unavailable in QuickBooks Online. I recommend submitting feedback to our product engineers, considering this in future updates. Here's how:
- Go to the Gear icon.
- Under Profile, select Feedback.

- Enter your thoughts or ideas, then click Next.
For now, we can use the Memo field to type the expense category (or a brief description) when you create a check in QBO. This memo will typically appear on the check stub, providing a manual method to include relevant details.
Also, we can generate a Check Detail Report in QuickBooks Online (QBO) that lists all checks issued within a specified date range. This report includes details such as the check number, date, payee, amount, and the accounts or categories to which the check was issued.
Feel encouraged to let us know in the comments below if you have any other questions.