Can anyone tell me why my “mark as paid” option has disappeared on the app?

The "Mark as Paid" option may not appear due to outdated app data or an older app version, @dcentertainment92. Let’s perform some basic troubleshooting to resolve this and ensure the app is working as expected.

Here how: 

For iOS

1. Go to Settings, then tap General.
2. Tap iPhone Storage, then tap the QuickBooks Online app.
3. Tap Offload App. It will free up the storage without deleting your app's documents and data.

For Android

1. Go to Menu ☰, then tap More Options ⋮.
2. Tap Settings, then Refresh Data.
3. Tap YES to confirm.

 After that, you can uninstall and reinstall the QuickBooks Online app to ensure a fresh start with the latest version.

If the issue persists, we recommend contacting our Live Support team for further assistance. They can provide real-time guidance to ensure everything is functioning smoothly.

If you have any additional questions, please don't hesitate to reply. We're here to help.