How do I change my billing address?

Welcome to the Community, @summersong7601-g.

I'll show you how to update the billing information in your QuickBooks accout. Before we start, please ensure you're logged in as the  master or company admin of the account.

Then, follow the steps below:

1. Go to the Gear Icon at the top.
2. Select Account and Settings, then go to the Billing & Subscription section.
3. Click Edit icon beside your payment method and enter your credit card information. (Card number, name on card, expiration date, and security code.) 
4. Ensure to verify the billing address in QuickBooks is the same billing address on the credit card statement.
5. Once verified, click Confirm card or Save.

Yo can also check our this article for more details: Update payment method for QuickBooks Online subscription.

I'm here to guide you again if you have any more concerns. Have a good one.