Your lender is required by law to report to the U.S. Internal Revenue Service (IRS) and you, using IRS Form 1098-E, the amount of interest you paid on your student loan each year. Your Servicer will send you a copy of IRS Form 1098-E by January 31st.
Additional Resources:
IRS: P: (800) 829-1040 or https://www.irs.gov/newsroom/tax-help-available-at-irsgov