I'm here to take care of your account renewal concern.
You'll have the option to renew your QuickBooks Online subscription from Your Account. Make sure to sign in as the Admin of the company to prevent errors.
Below are the easy steps you can follow:
Click the Gear icon at the top-right of your screen, and then choose Your Account under Your Company.
Click Subscribe or Renew to the right of Subscription Status.
If you already have an activation code click on "Already have an activation code?" button (1) and follow the screen instructions.
If you have a "Promotion Code", enter it in the text box.
Click Apply button (2)
If you wish to purchase multiple activation codes/subscriptions, select the "Need to buy multiple companies?" button (3).
Choose the number of subscriptions you want to purchase from the drop-down, and then click on the "Subscribe Now" button.
Enter the Billing Address details and check the Terms, Conditions checkbox and click Continue/Make Payment.
Select the payment option and follow the screen instructions to make the payment.