If I leave my family for a day to do something completely harmless and they ask what I'm doing and where If I don't answer immediately they will call the police for a wellness check. it's not right. My privacy is invaded all the time. I'm an adult I shouldn't have to deal with this. If I dont answer their questions about where I am, what am I doing and why my parents threaten to call the police to make sure I'm not in any danger to myself. I'm not.
On the one hand, you say you are an adult. On the other hand, you still live with your parents. Now that's
not to say that it is fundamentally immature or unhealthy for adults to still live at home. In many cases, it can be a beneficial arrangement for all involved. But in the worst cases, it can be
extremely toxic. Clearly by staying in their home (I assume rent-free), and presumably by them also paying for your food and other expenses, you are entering into an unspoken agreement with them that in return they get retain those typical 'parental' controls over you that for most people would have ended in late adolescence.
The advice
above is certainly useful, but you need to bear in mind that if those suggestions don't work, ultimately everything comes down to your parents having
leverage over you because they have something that you need (i.e. your current home, and any financial support they provide to you). If other suggestions don't work, you may need to consider whether moving out is an option. If it is not, then you may need to reevaluate whether or not there is much point in getting frustrated over a situation you may not be able to do much to change. That is to say, you need to see the parental control as being a
worthwhile sacrifice in exchange for the massive amount of money you may be saving by still living at home.
Also, I'm going to take a wild guess that because you are posting on a suicide board, you have at the very
least previously expressed a desire to suicide that your parents are aware of. So it's
not necessarily unreasonable for them to be concerned about you suiciding if they don't know where you are or what you are doing. This would especially be the case
if you have refused to get any form of therapy or medication, because it means that your parents are essentially the first and only line of defence against your suicide.