TurboTax doesn't always give the best advice. NJ used to accept within 48 hours. Last year and this year have been a train wreck. I have filed for an NJ extension now three years in a row.
As I said I used the NJ Taxation website. I also used it to pay my NJ taxes and estimated taxes outside of TurboTax and they were debited from my account on the Due Date as they were supposed to be.
I can't answer your other questions.
