Can I get a write off for taking BART to get to my college campus in San Fran when I come home from a break? -

Some lady was trying to help me with the BART ticket machine when I knew how to use it (she was obviously homeless because she asked me if I had any change after explaining everything to me) but at the end she told me that I could get a government write off with my receipt. Is that true?

You mean a tax deduction for your transportation between school and home? Only if you have a deductible basis for it, not because you are a student. Did this woman get free BART tickets. She might be in a homeless program. San Francisco might have some programs for city residents.

some work places have a commuter programs.

No.