How can we change the registered account

It's nice to see you here in the Community, Optimum Output.

If you're trying to change the registered account for your QuickBooks Online subscription, you can follow the steps below to complete the process.

1. Sign in as the Master or Company Admin.
2. Click the Gear icon ⚙ at the upper right corner, then select Account and Settings.
3. From the Billing Subscription tab, click the pencil icon ✎ beside your payment method.
4. Update your credit card info.
5. Make sure the address in QuickBooks is the same as the one on your credit card statement.
6. Once everything’s good, select Confirm card or Save.

However, if you're trying to change your payroll bank account, here's how:

1. Click the Gear icon ⚙ at the upper right corner, then select Payroll Settings.
2. Look for the section titled Bank Accounts. If you see this section, go to step 3. If not, contact us so we can help you change your bank account.
3. In the section titled Bank Accounts, select Edit ✎.
4. Tap Update.
5. Select Add new bank account.
6. If you bank with one of the 8 banks listed, select the bank and enter your online banking user ID and password. Otherwise, search your bank name or select Enter bank info manually. Enter your routing and account number, then select Save.
7. Select Submit.

For your reference, check out this article: Change your payroll bank account. It contains additional details on how to manage your payroll transactions in QuickBooks Online.

If you're referring to something else, please let me know. I'll be more than willing to lend you a hand.