If not filed yet:
To EDIT a form 1099-R
Click on Federal Taxes (Personal using Home and Business)
Click on Wages and Income (Personal Income using Home and Business)
Click on I'll choose what I work on (if shown)
Scroll down to Retirement Plans and Social Security
Click on the 1099R area and EDIT each one you want to go over and carefully answer the questions that follow the 1099r entry.