You can amend a tax return three years from the date your original return was due or within two years from the date you paid the tax, whichever is later.
Right now, you can amend your tax returns for 2014, 2015 and 2016. After April 15, 2018, you can no longer amend your 2014 tax return.
If your did not report one or more forms 1099-MISC, you can amend your returns to add them, within the above time limits.
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. <a rel="nofollow" target="_blank" href="https://www.irs.gov/taxtopics/tc308">https://www.irs.gov/taxtopics/tc308</a>
Page Last Reviewed or Updated: 01-Mar-2018