You can go to the Federal Student Aid site , click on the link for “Public Service Loan Forgiveness” or “Teacher Loan Forgiveness”.
In 2007, Congress created the Public Service Loan Forgiveness Program to encourage individuals to enter and continue to work full time in public service jobs. Under this program, you may qualify for forgiveness of the remaining balance due on your eligible federal student loans after you have made 120 payments on those loans under certain repayment plans while employed full time by certain public service employers. Since you must make 120 monthly payments on your eligible federal student loans after October 1, 2007 before you qualify for the loan forgiveness, the first cancellations of loan balances will not be granted until October 2017.
The Teacher Loan Forgiveness Program is intended to encourage individuals to enter and continue in the teaching profession. Under this program, if you teach full-time for five complete and consecutive academic years in certain elementary and secondary schools and educational service agencies that serve low-income families, and meet other qualifications, you may be eligible for forgiveness of up to a combined total of $17,500 on your Direct Subsidized and Unsubsidized Loans and your Subsidized and Unsubsidized Federal Stafford Loans. If you have PLUS loans only, you are not eligible for this type of forgiveness.