I need to change the Apple ID on my iPad
How do I update my Apple ID on my iPad?
iPad mini Wi-Fi + Cellular (MM), iOS 9.3.5
Question marked as
It isn't clear to me exactly what it is that you want to do. If the following doesn't help, you may want to reply with more information.
If you want to change the email that you use as your Apple ID and then use that on your iPad (or any other Apple device or service), see: Change your Apple ID - Apple Support
If you have an iPad that you got from someone else and want them to sign out and erase it so that you can set it up for your use, see: What to do before you sell, give away, or trade in your iPhone, iPad, or iPod touch - Apple Support