What time restrictions do I have to amend returns from 2015, 2016, and 2017?

[lhurff213]

when importing data from my brokerage, I did not realize my partner's info was tied to mine.  Her information was included twice in our tax return.  is it too late to correct 2015?  what is the deadline for 2016?

[DoninGA · Accepted solution]

If taxes are owed then an amended tax return can be filed at any time.

If for a tax refund, then you have up to three years from the original due date of the tax return or if an extension was filed the extension date.  For tax year 2015 the amended return has to be filed for a refund on or before April 15, 2019 or if a 2015 extension was filed, October 15, 2019.

[Ashby]

The deadline is 3 years from the initial filing deadline. So, your 2015 amended deadline is April 15th of this year.