One day I hope to work for the IRS. Hey my parents gave me the Biblical name of Matthew and I've gotta live up to it.
To my understanding the audit process is automated. If enough red flags are raised, yours can be chosen. My guess is that this is computerized though I am not sure. It is a very secretive process as obviously they don't want people to know what will make you get audited as then the real crooks would find ways around it. As long as you have kept good records and provide the information they request you should have no problems, unless there is a mistake. Good luck I hope it all turns out fine.