How to add bill using mobile apps?

Welcome to the Community, Michael.

Upon checking here on our end, the option to create a bill in QuickBooks Online (QBO) mobile is unavailable. We see the importance of having the option to generate a bill, and in this situation, we recommend sending a feature request to our Product Development Team. If you're using an Android or iOS device, here's how you can send a suggestion:

1. Access your QuickBooks Online company in your mobile app.
2. Click the Menu icon.
3. Select All and then choose Request a feature.
4. Enter a brief description of your feature suggestion.
5. Once you're ready, click the Send Feedback button.
    

In addition, here's an article to learn more about what QBO mobile app has to offer: QuickBooks Online app overview.

If you need assistance managing transactions or performing specific tasks inside the program, you can visit us anytime so we can help you address your concerns. Have a good one.