Applying to a Uni before graduating with BS ?

Hello everyone ☺️

I’m from the US and I’m currently doing my studies remotely in Germany. I graduate with my BS in computer science from the US in March. I would like to get into a MA program but I’m not sure if I need to be done with my bachelors completely or if I can apply if I only have a semester left… I’m kind of on a time crunch for visa purposes…. Any information would be highly appreciated!