Hello, Krez. Let's collaborate on how to mark the billable checkbox in QuickBooks Online.
Please note that the billable checkbox is only available for transactions such as bills, expenses, and checks. Additionally, this feature is only functional in QuickBooks Online Advanced and QuickBooks Online Plus.
If you encounter abnormal behavior or performance issues with QuickBooks, it may be due to browser-related problems. Since you can't mark the billable checkbox, we can try logging in to your QBO account using a private browsing window, as this ignores cookies and does not record browsing history or data, which may help resolve the issue.
Use these shortcut keys on your keyboard to access incognito mode:
Google Chrome: Ctrl + Shift + N
Mozilla Firefox: Ctrl + Shift + P
Microsoft Edge: Ctrl + Shift + P
Safari: Command + Shift + N
If there's no issue with using a private browser, you can switch back to your regular browser and clear its cache.