Get your taxes done using TurboTax

I just filed an extension for my federal taxes and it was rejected.  I called customer support and found out that it was rejected because I was trying to do it prior to 5/17. Why on earth did the software not warn me of that? Apparently it will be rejected if you try to pay but accepted if you don't (because it is actually processed 5/17).  I already re-submitted without payment before finding this out. SO frustrating!