Why not read the yellow highlighted articles to the right of your post.

After that scroll down to see how many times Lisa has answered the same question and offered a potential work around.

There were instructions given on that procedure, and you need to read the info presented when a yellow band pops up when you open the program. The instructions given were that for now the program will now let you put the date past 4/15, but you will still get error message. When you e-file the return you turn off error checking. There will be an update coming to fix that.