how to disable my ipad
i disable my iPad cause i forgot my code
If your phone IS disabled:
If your iPad is disabled / you have forgotten your passcode, you should follow the steps here.
If you want to disable your phone (if you have lost it):
If you had Find My enabled you can go to https://www.icloud.com/find
This will also be helpful for you - If your iPhone, iPad or iPod touch is lost or stolen – Apple Support