Did you get this issue resolved? I have the same problem. Cannot process payroll. I had a subscription in 2016, cancelled it in 2017. Tried to reactivate in QBDesktop (QBD) and needed to call 800 number. Called 800 number, rep processed my credit card payment, told me I was all set. I saw the credit card charge was successful. Next day, I see a credit card refund! Then, a new credit card charge (for less money) was on my credit card. I have tried to get the service key every day for over a week and still cannot. I thought maybe there was a startup time so I just kept trying every day. I still receive the error 20004 though.