First, verify that it is your Social Security number shown on Form 1099-INT. If it was for a joint account with someone other than your spouse, perhaps the other person should be the one reporting it.
The deadline for filing an amended return for 2016 has passed if you are filing to receive an additional refund. Since you would be reporting additional income, the amended return would be appropriate. However, adding about $75 to your income would result in a very minimal change in your taxes owed.
Take a look at your 2016 return and see what your taxable income was as it was reported. Add $75 to it and look up that number in the tax tables to see how your income tax would change. Then decide if it is worth the effort to file an amended return given the fact that the IRS did not catch the omission.
For your reference, here are the 2016 tax tables: 2016 Tax Table Form 1040
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