all income is supposed to be reported. you can omit it and file and see if the IRS sends you a bill that would include the additional taxes, penalties and interest. The IRS might not if the amount is extremely small and your taxes don't change. Not reporting everything is a poor practice to get into.
others may offer free-file in which you can report the interest.
https://www.irs.gov/filing/free-file-do-your-federal-taxes-for-free
