You can amend your 2014 return. it is too late to amend your 2012 return, however. You only have three years from the filing deadline to amend a tax return.
https://ttlc.intuit.com/questions/2589210-how-to-amend-change-or-correct-a-2014-return-in-turbotax
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
