Hi there! It's not unheard of for some people's returns to change after they've filed, for a few different reasons.
What do you mean you got a letter from the GA Dept of Revenue website? Did they email you?
Also, when you call to inquire, I recommend looking up the GA Dept of Revenue's phone number separately from the letter you received to ensure you are calling the right place. This could very well be a real letter, but you can double check the phone number on the letter by looking it up separately.
