I'm assuming you have already filed your income tax return(s) and the IRS and/or state government have processed your return. By processed, I mean the IRS/state have accepted your return and you received your refund or paid your amount due.
If so, then, It depends.
- If the $16 results in you owing additional income tax(es), then yes, you need to amend your income tax return(s).
- If the $16 does not affect your refund or balance due, then no, you don't have to amend your income tax return(s).
For additional information, please see Do I need to ament?
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