Step 1: If your traditional 401k allows partial rollovers to a traditional IRA, do such a rollover. Step 2: Convert the Step 1 tIRA to Roth. Step 3: Withdraw the rollover amount from the Roth IRA. You'll owe taxes on the amount converted to Roth, but payment is not due until the next April 15 at which time you can deduct against it.