To enter your self-employed retirement contributions in TurboTax, log into your tax return  (for TurboTax Online sign-in, click Here) and type "self-employed retirement" in the search bar then select "jump to self-employed retirement". TurboTax will guide you on entering this information. 

Enter self-employed retirement in the Search box located in the upper right of the program screen.  Click on Jump to self-employed retirement … TurboTax will guide you on entering this information.