I funded my traditional IRA, then converted it to Roth IRA (backdoor conversion), non-tax deductible, and not taxable transaction either. How do I reflect this on Turbotx

[MinhT1]

The backdoor Roth IRA conversion is a two-step process: 

1. entering your contribution to a nondeductible IRA, then
2. entering the conversion of the nondeductible IRA to a Roth IRA.

Please follow the instructions in this TurboTax Help article on how to enter a backdoor Roth IRA conversion.