I cannot unlock my passcode on my ipad help me out please

Start here: If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled - Apple Support

A few questions that might help:

Did you change your passcode lately?

Are you using a physical keyboard, and are you sure the caps lock is off?

Is your passcode all numerical or an alpha-numeric mix (that might have ambitious characters)?

I hope this helps