I did not claim my estimated tax for last year on my 2015 taxes. Can I include them on 2016's

[SeanE1 · Accepted solution]

Unfortunately the IRS does not allow that.  You will have to go back and amend your 2015 income tax return, and include the amount of your 2015 estimated taxes payments that were paid in 2015. If you used Turbotax to file your 2015 income tax return, you can also amend using Turbotax and it is free.  I have included a Link below that will help you get started:

https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed