I have had this issue before with TurboTax and think that I have finally figured it out....at least for 2019. Your version of TurboTax matters. I used Deluxe 2019 and was not given the option for the 179 election. I switched to Home and Business 2019 and was given the option when you enter the cost like the person said above. BUT...I had to delete the vehicle asset that I created in Deluxe because it still would not give me that option in Home and Business for the vehicle that I created in Deluxe. So, I deleted and reentered the same vehicle and it then gave me the option. I hope this helps someone because it was driving me crazy as well. I am not sure about the other versions.
