Recommendation letter timing question

I am planning to submit my aadsas in June. I will have everything ready for completion by then such as transcripts, required recommendation letters etc. At the beginning of July, I will be starting a new job and I feel that if I got a letter from my supervisor, it would be very helpful. If I asked him to write and submit a letter of rec in early August ish, would dental schools still take a look at this letter? Would this delay my application? Thank you!
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums