First, read this http://talk.collegeconfidential.com/what-my-chances/470497-clam-fart-oh-my-god-what-did-i-do-p1.html
Second, send an email stating: I noticed an error and i wanted to correct my resume to say that I worked at Bobby’s Burger Barn from 1/2017 to 9/2017.
Or don’t worry about it…admissions isn’t going to pay attention to the financial aid form…and if they did they would look at what you said on the financial aid form.