dmertz
Level 15

Deductions & credits

A rollover from the traditional account in the 401(k) to a Roth IRA would be reported on a separate code G Form 1099-R.  Assuming that you had no after-tax basis in the traditional 401(k) account, the taxable amount in box 2a of the code-G Form 1099-R should be the same as the amount as in box 1.