Hi Janice!
September is one of my family's very favorite times to visit Walt Disney World, as well. With any luck, the crowds improve as the school year begins and the weather has cooled off just a bit. I'll definitely keep my fingers crossed that this is the case for you and your daughter during your visit this year!
As of now, there has been no official announcement about free dining this September--but that doesn't mean it isn't going to happen. My advice would be to keep an eye on the
Disney Parks Blog for any news about it in the months to come. Just so you know, the free dining dates for 2015 were announced around the end of April last year. Hopefully, that will be the case this year, as well. Like you, I will be hoping I get the chance to take advantage of that amazing offer sometime very soon.
Please let us know if there is anything else we can do to help you with your planning. Have a wonderful day!
-Nancy-