Yes, you will enter your Form 1099-R from the TSP distribution similar to how you input the information on your W2.
Please follow these instructions to enter your Form 1099-R:
- Login to your TurboTax Account
- Click "Take Me To My Return"
- Click "Federal" from the left side of your screen
- Scroll down and click "Start or Edit/Add" next to "IRA, 401(k), Pension Plan Withdrawals (1099-R)"
- From here you can enter all the information from your Form 1099-R, including the 20% withheld