There are no second extensions. So.....after the October deadline you will just be late. Online tax preparation and e-filing will close after the October deadline, so if you miss it you will need to use the CD/download on a full PC or Mac, and mail your tax returns.
If you are getting a refund, there is not a penalty for filing past the deadline. If you owe taxes, the interest/penalties will be calculated by the IRS based on how much you owe and when they receive your return and payment. The IRS will bill you for this; it will not be calculated by TurboTax.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
