To access previous year returns to file an amended return, do you need the deluxe version of the current year or the deluxe version of each year that you want to amend?

You will use the program of the year you want to amend.  Example, if you want to amend 2015, you will use your 2015 program.  However, if you filed any of them with the online product, you will down load the amend program for that year.  See below for more:

https://ttlc.intuit.com/replies/3288565