Where do we enter the portion of mutual fund income that is from U.S. government bonds, etc., to get the tax exemption?

Vanguard sent me a flyer "U.S. government obligations information" that contains the percentages of income from certain mutual funds that are from federal bonds, etc.  For example, their Federal Money Market Fund and their Prime Money Market Funds have income from federal bonds. The flyer states that this income is usually EXEMPT from taxation in most states.

Yeah! That is great news! 

However, where do I enter this into Turbotax (desktop DVD version)? 

If it matters, I'm in California.