A Roth conversion is not a regular Roth IRA contribution. Remove any entry you made under Deductions & Credits regarding the conversion, it doesn't belong there at all. You simply enter the Form 1099-R that reports the distribution from the traditional IRA, indicate that you moved the money to another retirement account, indicate that you did a combination of rolling over, converting and cashing out (even though you may have converted the entire amount), then indicate the amount converted to Roth. TurboTax will prepare Form 8606 Part II for the Roth conversion and will include the taxable amount (the entire amount since you have no basis in nondeductible traditional IRA contributions) on Form 1040 line 4b.
