I just got my AP a couple days ago, and I haven't figured it out yet. I'm needing to add a night to the beginning of our trip, and I'd rather not have to call.
If your new AP is linked to your MDE account, you can search for AP rates. This works if you have activated the AP or if it is just a voucher for a new AP that you would activate when you are at WDW.
Direct link to search for AP and other offers on the Walt Disney site (note: you need to Sign In to your MDE account):
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