Dvidends from US government bonds; I'm in Missouri.

With regard to dividends from US government bonds; I'm in Missouri.
 
Some brokerage houses will have it clearly specified on the 1099, but some don't.  I have asked the ones that don't and am still waiting for a response.  Going to the Fund website leaves me searching through countless pages of information, mainly the current fund makeup.  Is there a common title for this information, I have tried some obvious ones, or phrase that would be a suggested search term?  Google gives me the report I want but for funds I don't.  
 
Once I get this information, I know how to enter it in TT but unsure what supporting Docs I need to attach (How) when filling electronically.