Using the android app, can I add a discount to an invoice?

Hi @lewis_holley-hot,

Yes, this is possible in the mobile app of QuickBooks Online (QBO).

You'll have to enable the feature via browser first. If you don't have access to a PC or a laptop, you can open your mobile device's browser. 

Then, follow these steps:

1. Go to the Gear icon.
2. Select Account and Settings.
3. Click the Sales tab.
4. Tap the Sales form content section.
5. Toggle the Discount feature.
6. Press Save, then Done.

After going through the steps above, you'll find a Discount field when you create a new invoice via the QBO mobile app. 

You can open this article to see a list of features available in the mobile app: Compare mobile app features. It has a table that will give you an overview as to which feature is available on either Android or iOS devices. 

Is there anything else I can assist you with? Post a comment below if you other questions, and I'll get back to you.