Trying to attach a file to an invoice and keep getting attachment upload failed, is there anything I can do?

Glad to see you here in the Community, @Authority Mechanical.

I want to make sure you're able to attach a file to an invoice in QuickBooks Online.

It's bet to be resetting the app's data. This is the same as clearing the cache in your web browser. They save time by collecting cache (cookies) when loading repetitive data and graphics. These files can get corrupted or outdated, leading to problems like your app not opening your company data. Here are the steps to reset the app data:

1. From the top screen, click on the Help menu.
2.  Choose Reset App Data from the drop-down.

Check out these guides in case you'll encounter other issues along the way:

• Attachments in QuickBooks Online
• Fix common errors in the QuickBooks Online mobile app for Android

Hit the Reply button if you need more help with QuickBooks and invoices. I'm always willing to back you up. Have a great day ahead!

Hi, I keep getting the same message but when using the app on my iphone...the response given for this issue above won't work for me as there is no Help button on the app...please assist.

Thanks for joining this conversation, @Attachment Upload Failed.

I appreciate you following the steps shared by my colleague above. Allow me to chime in and help make sure you'll be able to attach a file to your invoice in QuickBooks Online (QBO).

The steps provided by my colleague above are for QuickBooks Desktop (QBDT) App. Since you're the mobile app version, here's how to clear its cache:

For IOS:

1. Open Settings and swipe down and tap Safari.
2. Swipe down again and select Clear History and Website Data, click it once again to confirm.

If the issue persists, You'll want to uninstall and reinstall your mobile app. Here's how to do it:

To uninstall in an iOS app:

1. Open the App Store on your device and search for QuickBooks Online.
2. Select Uninstall.

You can log in using a browser and attach the file from there as another workaround. You can refer to this article for the detailed steps on how: Attachments in QuickBooks Online.

Please keep me posted on how it goes. Let me know in the comments if you have other concerns. I'm always around to help. Take care, and I wish you continued success.