If had a non deductible ira contribution for 2015 that I made between Jan 1 and April 15 2016, can I still apply it to 2016 taxes?

[macuser_22 · Accepted solution]

No. That should have been reported on your 2015 tax return.   If you did not report it then, you do not need to amend, but can file a stand alone 8606 form with the 2015 contribution on line 1. Any prior nondeductible contributions from the last filed 8606 line 14, on line 2.   The total of 1 & 2 on line 3 and 14.  And mail it to the IRS.

You  can download the 2015 8606 form from the IRS here:
https://apps.irs.gov/app/picklist/list/priorFormPublication.html

Enter 8606 in the find box and choose the 2015 form and instructions.