No, if your parent's only income is SS, then they do not need to file a return. And it should never have been entered on your return. That made it look like your income was higher than it really was, and may have caused you to pay too much tax. You can amend as far back as 2015--but amend 2015 by April 15, 2019 or it will be too late.
**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.**
