You have to first tell Turbotax you contributed to a nondeductible traditional IRA,  then enter the 1099-R and tell Turbotax you converted to a Roth.

If you enter the 1099-R first (which is what happens if you follow the step-by-step process) it wants to tax you on the conversion

Hello, can you share a step by step procedure to do what you are saying to do using 2018 premier version.  I followed every step by step process and entered everything but can not find the non deductible steps until the end, but as you state i must not do it as turbotax says.  What do i need to delete seeing i have already entered my 1099-r.    thanks