TurboTax supports Form 40-EXT for printing but not for efiling. If you are having trouble, go to the link below to get the form.
Oregon (OR) automatically gives you a 6-month extension to October 15 if you filed an approved federal extension. Otherwise, print and mail Form 40-EXT by April 15. If you owe, submit payment by April 15 to avoid penalties by including a check with Form 40-EXT.
If you have other questions about this, ask in the comment section below.
Here is the form: