I'm hoping that the TurboTax FAQ below will instruct you on printing your extension (Form 4868). You will have to go ahead and make payment for the TurboTax program in order to access the form.
"How do I print my 4868 extension after e-filing it through TurboTax Easy Extension?"
https://ttlc.intuit.com/replies/4736887
*** I am NOT a tax expert. I am a seasoned TurboTax user, and volunteer to provide assistance to TT users. Nothing I post is to be considered TAX ADVICE; I bear no legal liability for responses.***