How are you trying to file an extension. You can do it a few ways in TurboTax.
- Type extension in Search in the upper right
- Select Jump to extension
- Select Start Easy Extension
Or you can click on File a free extension on Free federal tax extension is available
If you will owe the IRS, go to the IRS "Make a Payment " page an d indicate your payment is for an EXTENSION.
you will get a confirmation number for your records.
if you know you will get a refund, you don't need an extension.