If you go to channel 114 it will say if you are Authorized for the ST for next year.
If your Authorized and your seeing 0.00 on your bill then I would say that they have not started taking your monthly installments out.
What I wish is that they allow you to pay it once, like I do .... I pay all mine at once, but it just takes that money and shows it in the monthly bill anyways I believe.
I haven't looked at my bill lately though.
I just checked mine and it also shows 0.00, however mine is free this year, so I'm guessing thats why.
Also, most people start seeing the payment taken out in say March for the next years ST, so it should definitely be being taken out by now, we've only got 2 months to go.