It took a long time last year to get the dates changed.  I have resorted to custom client letters and manually changing the due date and going into the print menu to default that the custom letter prints with the return.  That way when they do change them I haven't messed up my template and it's easy to switch back to the standard letter.  Hope that helps in the meantime...As for the States, you will probably need to check the website for your state to see if they are complying with the Federal due date.