I am getting the same error. My product was initially activated December 2020. I have used TurboTax without problems for almost one month. Yesterday I was asked to enter my activation code. I entered the correct code and I got the 607 error. Same thing today.
I have rebooted with no change. I have no problems with internet access. I disabled virus software and still the error persists.
I no longer believe that the problem is with my system.
