The program can give you a detailed explanation of the calculations it makes for a particular tax form (what gets carried from where, and so on).
Click the Help button on the the program's main window.
In the table of contents pane of the Help Central window, click on Form Help (Explain This Form).
For more information on the types of Help available, see Getting Tax Help, About Help Central, or click one of the items in the Help Central table of contents.
If you need help locating information, click the Search button.