Discussion:
I want to change premium to other site in my account
What are you trying to achieve:
I have given premium to other site in my account i need to change to other site]
I think the easiest way would be to contact customer care directly.
Hey @Rosangela_Silva! 
It’s possible to transfer a Premium Plan to a different site in your Wix account.
This article in the Help Center should point you in the right direction - Assigning a Premium Plan to a Different Site in Your Wix Account | Help Center | Wix.com