Welcome to the Community, Rob. I'm here to provide information on adding a new payment method to your QuickBooks Online account through your Apple device.
Since you're subscribed via an Apple subscription and want to add a new payment method, you'll have to update the billing on your iOS device. To do so, kindly follow the steps below:
- Go to the Settings app.
- Click on your name.
- Tap Payment & Shipping. You'll be asked to log on using your Apple ID.
- Tap the Payment method, then tap the Edit button to update the billing information of an existing card.
- Enter your new billing details. When finished, tap Done.
As a reference for updating one's payment method, you can use these helpful materials:
In addition, to help manage the company's operations and bookkeeping, you can create user roles. Each role can configured with permissions assigned to each task: Add and manage users in QuickBooks Online.
Let me know if you need further assistance adding a new payment method to your QBO account, Rob. I'm just a post away to assist you. Have a great day ahead!