TT is software to provide assistance in completing the tax return. It is not software that maintains due date reminders for the users. Users of the business software should have some basic understanding of when tax returns are due; just as you are expected to know when your personal tax return is due.
Yes, the due date for the LLC tax return changed. This change was passed in July 2015 effective for tax years that begin after December 31, 2015; effectively for 2016 calendar year taxpayers.
Write the IRS back and indicate that you were not aware of the change. There is a good change that they will waive the penalty.
*A reminder that posts in a forum such as this do not constitute tax advice.
Also keep in mind the date of replies, as tax law changes.
