Can I sign in from multiple phones at once?

Yes, you can do that, justinsoutherlan.

QuickBooks mobile app used cloud storage and syncs across all your devices. This allows you to run your entire business anywhere. You can access your account on multiple devices. However, you will receive a prompt that someone signs in on another device. It's still best if you can focus on one phone. This prevents unauthorized access to your account.

In addition, let's ensure to install the correct mobile app. You can use this link to download your app: Download QuickBooks Self-Employed app.

For your future reference, you can review this resource to learn more about the transaction and how it can be done in QuickBooks Self-Employed app: QuickBooks Self-Employed app tutorials.

Feel free to post a reply if you need additional details about the mobile app. I'll be here to help you. Take care always!