I've got the steps to update your payment method in your app, Ada.
Since you subscribe using your iPhone, you'll want to update your billing information directly on your iOS device. You can do this through the app settings. I'd be glad to show you how:
- Navigate to the Settings app.
- Click on your name.
- Select Payment & Shipping. You'll then be asked to log in with your Apple ID.
- To update an existing card, tap the payment method and select Edit.
- Enter your new billing information, then Done.
Please see this article for additional guidance about managing payment methods and other subscription details:
I've also included a couple of detailed resources about working with invoices that could come in handy moving forward:
Keep me posted if you have further questions about managing your subscription in QuickBooks. I'll be back with you as soon as possible. Take care.