roth IRA conversion

[kvu]

I converted $45,000 from my tradional IRA into a Roth IRA

1099 R showed:

Box 2a taxable amount: $45,000

Box 2b taxable amount not determined (checked)

Box 7 distribution code 2

But TurboTax determined that I do not owe any tax on this distribution?

[VolvoGirl]

After you enter the 1099R it will ask you some follow up questions.

Pick you moved it to another retirement account.  Then it will ask if it was to a ROTH.  

Then choose - I did a combination of rolling over, converting or cashing out the money
Then it will ask how much you converted to a ROTH

[dmertz]

I suspect that TurboTax told you that there is no "additional" tax, meaning no early-distribution penalty.  I also suspect that the IRA/SEP/SIMPLE box is marked on the Form 1099-R, so you should see the taxable amount appear on Form 1040 line 4b.