Where is prompt for second1099R?

Enter a 1099R under
Federal on left
Wages & Income at top
Then scroll way down to Retirement Plans and Social Security,
Then IRA, 401(k), Pension Plans (1099R) - click Start or Update

If you get the screen of partners you can import from click the bottom circle for I'll type it in myself - Continue
The next screen should be What Type of 1099R is this? With 4 choices. Pick the right kind you have.
And on the same screen you pick which person it is for if you are married.

Type 1099-R in the search box and click on jump to 1099-R. That should bring you to the screen where you see the one already entered and can add another one. 

You should get to this screen listing the one you already entered