Unless you are in ME or MA and can do it in less than 25 minutes when midnight strikes, you are too late. If you are out of the country you have until June 15. Otherwise, you are just late now.
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.