How do I prepare my iPad for repair service

Here is a link that will tell you what you need to know https://support.apple.com/en-us/HT201557

Hi

Go to settings iCloud backup now

Then turn off find my ipad

Then settings restore iPad back to factory settings

When you get ipad back set up over your WiFi

When it asks if you want to use iCloud backup say yes .

Cheers

Brian