I'm receiving the exact same error code when trying to electronically file federal and Louisiana at the same time. I was able to file the federal return electronically when filing it by itself. I received the same error when attempting to electronically file the Louisiana return. At least we have some time before the Louisiana return is due, but it sure is frustrating to pay so much for something that doesn't work and then doesn't appear to be being addressed by Intuit.
Since the error states "Invalid Agency ID" it makes me think that there is a filing agency ID that would refer to TurboTax that is incorrect in the program in an area which a user cannot see to correct.
