I am webmaster for a clients website. I used the Basic plan to test for the client. They are happy with the service
and would like to upgrade to Premium.
I had paid and set up the Basic account. If they purchase the upgrade does the account and forms remain unchanged?
This is tricky. The account is attached to a specific Adobe ID and uses your credit card. If you upgrade the account it will just charge your credit card.
Are they going to take over the Adobe ID? If so I suggest you have them change the password and change billing information to their own before doing the upgrade.
Hope that makes sense.