The issue is most likely you have an iPhone and you forgot the passcode and/or right now the iPhone is disabled.

You will need to put the phone into recovery mode by turning the phone off while plugged into computer and then holding home button and turning the phone on at the same time until you get the iTunes recovery logo.

Then restore the iPhone from there which it will wipe your phone and thats the only way you can't recover data from a disabled iPhone.

More info here: https://support.apple.com/en-au/ht204306