I have been trying to efile since April 15, each time the return was rejected with this error being the reason.  From this discussion string, it is apparent that Turbotax has been aware of the problem well before April 15.  I tried one more time today, April 29, and the return was accepted.  While we all appreciate Turbotax' effort to resolve the problem, you would think that the most popular tax program would have anticipated the problem and fixed it before many users late filed with the related late fees.