Young Farmer Success Act This bill makes certain farmers or ranchers eligible for student loan forgiveness under the Public Service Loan Forgiveness (PSLF) program. Under the PSLF program, the Department of Education must cancel the balance of interest and principal due on a borrower's Federal Direct Loans after the borrower makes 120 monthly loan payments while employed in a public service job. This bill broadens the definition of public service job to include a full-time job engaged in farm work as an employee or manager of a qualified farm or ranch.