Login process described inaccurately

I have purchased the software for my daughter. About CS6 need to make any words, absolutely awesome.
The requirement of the serial number is, however nowhere described.
But if you know how to do it, it's easy. My serial number came within 36 hours, works perfectly.

What do you have to do?

Log in to Adobe, and create an ID (which is very well described).

After creating the ID you are registered as a customer with Adobe (you have already done, if you have for example, loaded a trial version).

You now need to simply open a support case, in which you enter the serial number that you received from Amazon.
As I entered the invoice number Invoice number of Amazon. So there's not a double-form or an extra page where you can get the serial number, but you can do this easily through a support request.

I hope this hint helps.