HI HOW TO CHANGE ONLINE BANK ACCOUNT MONTHLY INSTALMENT
It's nice to have you here in the QuickBooks Community, KIRAN2.
In case you're referring to the recurring payments, I can show you how to update the payment details.
Here's a quick guide on how to modify existing recurring payments.
If you're referring with the monthly subscription, I'd suggest contacting our QuickBooks Payments Support. They'll be able to further assist you with it.
You can always post again if you have other questions. I'm here to help.