Yes you can go back to the beginning and add the 1099R's .Here's how:
- Click on Federal Taxes (Personal if using Home and Business)
- Click on Wages and Income (Personal Income if using Home and Business)
- Click on I'll choose what I work on
- Scroll down to Retirement Plans and Social Security
- On IRA, 401(k), Pension Plan Withdrawals (1099-R), click the start or update button