Hi there, North. I’m here to walk you through the steps for printing invoices using the QuickBooks Online mobile app, based on the type of device you’re using.

If you're using iOS, you can do so by clicking the three-dot menu on the upper right screen. Here's how:

1. Open your QuickBooks mobile app.
2. Go to the Menu and select All.
3. Then, tap Invoices and choose the invoice you want to print.
4. Click the three-dot menu on the upper right screen, then select Print.
5. On the Options window, select your printer and ensure your Paper Size and Layout are correct.
6. Once done, click Print.

For visual reference, please see the screenshot below:

If you're using an Android device, you'll need to tap the Preview option and print the invoice using the PDF viewer, as it doesn't have a direct print option.

For visual reference, please see the screenshot below:

Alternatively, you can open your QuickBooks account using a web browser for seamless printing of your sales transactions. For detailed steps, please visit this article: Email or print multiple sales forms.

Feel free to comment below if you have other concerns or questions.