Why would you need to contact your financial aid office? What you need t9 do is correct your FAFSA to accurately state the amount your parent earned at their store in 2016.
It doesn’t matter where the money was earned…it could be on the Moon…you have to report it.
So…amend that FAFSA so that it’s accurate…because clearly, your family income in 2016 was NOT $0.
And understand that if you don’t correct this…and you get federally funded aid…you will have done so fraudulently…and fraud is a CRIME here. You could lose your college admission, any aid, and be fined.