Enter the 1099-R, exactly as received, including the withholding in box 4. The follow up interview will ask what you did with the money. Say you rolled it over to another plan (putting the money back is technically a rollover). That will make none of it taxable. TurboTax will put the entire amount on line 16a of form 1040 and 0 as the taxable amount on line 16b. The word rollover will also appear on line 16 (line 12 of form 1040A)
