We received a credit note saying out subscription plan has changed. We did not make any changes apart from subscribing to a new entity. Please help with the details.

Let me help you validate if there was a change in your subscription, sharat-hegde-vim.

Generally, any changes with your current QuickBooks Online (QBO) plan subscription may affect any discounts applied. To make sure that you'll know if there was indeed a change in your plan, I recommend contacting our support team so they can double-check your account. They have the tools to pull up your account in a secure environment. 

For your reference, I've included this article for more information: Upgrade or Downgrade Your QuickBooks Online Subscription. Aside from that, you'll want to check out some of our articles so you can manage your account: Manage Your Account in QBO International. 

Reach out to us if you have any concerns about your subscription. We're always right here to assist you further.