It's nice to see you in the Community, @jamieh.
Currently, there isn't a way to modify the Worker's Compensation report to exclude bonuses. Since there's no option to customize, you can only export the report to Excel and make necessary changes from there.
You can also check this link for other reports you can export: Export your reports to Excel from QuickBooks Online.
I'm preparing a feedback report to be sent to our Product Team so they can consider this in future updates. They're always looking for opinions on how to best improve QuickBooks.
In the meantime, you can visit our QuickBooks Blog for the latest news and updates.
I'm just around the corner if you have other questions or concerns. Thanks for reaching out and have a nice day.