@bobsimmons Never mail two years of tax returns in the same envelope---if you do that one can easily be overlooked. Mail each one in its own envelope. Use a mailing service that will track it so you know it was received. Prior year tax returns do not show up on the Where's my refund site--so the receipt from tracking is the only way you will know the IRS has the 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.**
