Get your taxes done using TurboTax

I Don't understand the comment: "Than go to check the appropriate box on your 1099R line B1 or B2.  Should straighten this out." in the response. Specifically where ins the line B1 or B2? Is B short form something? Is the line on the 100R I received or something in TurboTax. I can't find if the former. If the latter how to your "go to check the approriate box..."