They can find your location through your computer IP address or by pinging your phone. They may ask for your location, but it will be just to verify where your are. Some hotlines, i.e., crisischat.org will not contact the police if you promise you don't have imminent plans. If you dial the 1-800 suicide hotline, you will end up talking to someone working for a mental health facility/clinic in your geographic area and that person will use their judgement to decide whether to contact police. If contacted, the police will be told everything you said/wrote. Don't assume what you say is confidential. If you feel overwhelmed and don't feel you have anyone else to whom you can talk, then a hotline is a good choice, but realize that if the counselor thinks you're in imminent danger, they will call the police and may not let you know they are contacting them.