Thanks for starting a discussion about your billing switch, @Kiransp.

I can definitely guide you on how to update your subscription's billing renewal. Follow the steps in below to do that:

1. Sign in to QuickBooks Online.
2. Go to Settings ⚙, then Account and Settings.
3. Choose Billing & Subscription.
4. Tap Switch to monthly billing or Switch to annual billing.
5. Press Switch, then Done.

For more information, refer to the details in this link: Switch to annual or monthly billing for QuickBooks Online

If you're unable to do so, I highly recommend contacting our live representatives. We have a dedicated team for customer service who can help with updating your subscription terms. Here's how to contact our India Support:

1. Go to the Help menu then Search tab.
2. At the bottom, select Contact us.
   
3. Enter the keyword Account Management and Billing in the What can we help you with? box.
4. Press Let's talk.
   
5. On the next screen, scroll down to the Choose a way to connect with us section.
6. Choose Chat to initiate a discussion with a live agent. Our Live help is open Mondays through Fridays at 9:30 AM to 6 PM, IST.
7. When using the messaging option, make sure to enable pop-up windows. The chat box will appear at the bottom right section of your monitor, and an agent will be with you after filling in the information needed. 

Provide the details to our representative so they can check on everything for you.

I'll be right here if you need further assistance with anything in QuickBooks besides billing, let me know in the comments.  I'll be more than happy to help. Have a nice day!