I recently found an old 1099-INT form a small joint savings account from a prior year (2016) that I did not include in my original filing for that year. Since it's so old, I'm past the 3-year deadline for an amended return. Moreover, I never received a letter from the IRS asking to rectify the difference. The 1099 INT is only for about $75, but that is still above the $10 minimum limit. Should I try to file an amended return for 2016? Is there some way to verify that I need to rectify this difference? I don't want to just walk past this mistake and have it accumulate over the next years and decades to become a huge penalty (at least more than it already potentially has). Any advice would be greatly appreciated thank you!
