I would recommend that you see an accountant, and file your taxes for 2019 and soon for 2020. This would take a huge load off your mind, and will be necessary if you want to file FAFSA to apply for financial aid.
I had a friend once who was several years behind in filing taxes. They eventually caught up. I do not know if they paid a fine, but they definitely did not go to jail.
The sooner you get this straightened out the happier you will be.