If it is required by the state of Idaho to include a Form 1040 with the state return then the federal return will be included with the state return.

@barkfaulk - if you are efiling, you can assume that the state gets all the information required electronically. 

if the federal return is required and you paper file, read the instructions provided by Turbo Tax, but I suspect they will automatically add the federal return into the *.pdf if it is required for paper filing.