Retirement tax questions

But you said that is a 2016 1099-R that must be reported as a 2016 1099-R in the 2015 amended return.  

Is it a 2016 1099-R or a 2017 1099-R?  - The year of the 1099-R is on the form.

A 2017 1099-R with a code "P" is reported on a 2016 tax return.  A 2016 1099-R with a code "P" is reported on a 2015 tax return.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**