I have an invoice that was "created by itself/duplicated for no reason" and now it appears in my list on my phone and cannot be deleted and does not appear on my computer

Let’s work through some troubleshooting steps on your mobile app to help rectify issues with your invoices, Cernick.

Beforehand, duplicate invoices may occur due to recurring transactions or because other users had recreated an invoice without realizing it. If these entries aren’t visible on the QuickBooks Online web browser, they may not fully exist within your QBO database.

With that, it’s best to verify first if the invoice exists by checking the Sales Transactions page or the Audit Log feature. If duplicated transactions occur, you can delete them directly from the web program.

However, if invoices aren’t visible on the web and can’t be deleted from the app, unusual behaviors like this can cause data damage or store cached files.

Thus, let’s reset the app data to refresh your device and set it to its default state. To do this:

For iOS
 

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

For Android
 

1. Go to the Menu ☰ icon and tap More Options ⋮.
2. Click on Settings, then Refresh Data.
3. Select YES to confirm.

I’ll keep an eye on this thread for any additional queries.