Filing taxes independently for taxes does not necessarily mean that colleges will see you as financially independent for tuition purposes.
I also agree completely with @Groundwork2022 that avoiding debt is hugely important for Political Science. The field is so overpopulated that there is an expectation of no/low paid internships and entry level jobs are typically very poorly paid.!
The biggest thing you can do for yourself is to find schools that your family an afford without debt and then work super-hard to get internships- any kind, anywhere. The one tiny upside for students of Covid-19 is that pretty much all internships are virtual right now, so you can apply for placements all over the world.* . Internship experience will get you into good jobs faster than having a T-50 > T-100 name on your college diploma.
If you give us an idea of your stats, budget & location we might be able to come up with some options for you.
*for example, our polisci student just got an internship “in” Egypt, with USAID, while in school in the US