How do I transfer the 2015 & 2016 TurboTax federal & state returns on my old computer on to my new computer? (I want the more than just PDF copies of the returns.)

In other words, I'd like to be able to open the electronic versions of my 2015 & 2016 TurboTax returns on my new computer without having to manually re-enter the information currently found on TurboTax on my old computer.