Yes. Payments for support plans in Zoho CRM Plus can be changed at any time.
If you signed up for your Zoho CRM Plus account online, you can change your monthly support plan to yearly by yourself in Zoho CRM Plus:
1. Navigate to the Admin Panel.
2. Click on Manage Billing.
Click on the Move to yearly option in the list of add-ons. You have now switched to yearly payments for your support plan.