When recording a back door roth IRA why does the form 8606 not automatically show up and which letter choice do i choose to make it non taxable?

If you entered the backdoor Roth correctly then TurboTax will fill out Form 8606 automatically. Please review How do I enter a backdoor Roth IRA conversion? Please enter the Form 1099-R exactly as shown on the form do not make any changes.