Wrongly filed as a dependent (stimulus)

so... i messed up.

 

I filed my own taxes early in February, according to FAFSA I am a dependent. I don't know why, but for some reason I thought that I counted as a dependent on taxes because I am not yet 24. Well, when I went to help my mom do the taxes last week, it turned out they couldn't claim me as a dependent due to me not living with them and some other things.

 

So here's the problem: I apparently can't get a stimulus check because I said I was a dependent and I didn't get my education credit either because I checked the box about being a dependent.

 

Can I still amend my tax to not only get my stimulus check but also my education credit? How do I do that>