What happens to a stock if the company that was invested in crashes?

So my mom has control of my stocks since I am still not ready to handle the stocks, and one of the stocks is Tesla. This was back a year ago because my mom wants me to have a headstart.

Now, it seems like Tesla will just go bankrupt in some time. My mom has sold her stocks but can't sell mine due to taxes. What happens to my stock if the company goes Bankrupt?