Help with Tuition and Fees

In the fall of last year I had to withdraw from school due to the inability to pay tuition. I'd like to go back to finish my education and hopefully go on to get a Master's or another advanced degree. I would be on my junior year at UMass Amherst, double-majoring in African-American Studies and Legal Studies with a psych minor. I currently owe $20,000 and change, I've been paying it off slowly with every paycheck I'm getting from my two jobs, currently looking for more to have multiple streams of income go towards this bill. Anything anyone can give would be appreciated.