Hey.
I had the very same question. I contacted most schools and this is what they told me. Have your application completed by end of August. So that means, DAT scores IN, LOR IN, all other components of application. The only grey area is the transcripts. Those take time to be reviewed and processed. This is my plan. I am going to apply with everything but the DAT in early June, take the DAT on July 14. That way, I will have everything done by August.