Allow me to share some information about deleting transactions in QuickBooks Online (QBO), info.
Currently, the option to delete an expense at once is unavailable in QBO. You'll have to delete them one by one.
I know how convenient it would be for you to be able to delete multiple entries at once. I'd recommend sending a feature request directly to our Product Development team. This helps us improve your experience and the features of the program.
Here's how:
- Go to the Gear menu and then select Feedback.
- Type in your feature request in the description box.
- Once done, click on Next.

You can also track feature requests through the Customer Feedback for QuickBooks Online website.
You can refer to the following article for more information about adding, editing, reviewing, and deleting an expense in QuickBooks Online (QBO): Enter and manage expenses in QuickBooks Online.
In case you have expenses that need to be recorded while working for your customers, refer to the following article on how to record billable expenses in QBO: Enter billable expenses.
I'm always here if you need more help in deleting your expenses. Just let me know by leaving a reply below. Take care and have a great rest of the day!