TN - Employer

I went to school in the U.S. and got my degree in accounting. I stayed down there for a year after I graduated on my optional training visa. When that was over I decided to move back to Canada. Now that I've been here for a year, I've realized I want to be back in the states. I know that having a degree in accounting applies to the TN, but how do you go about finding a job in the U.S? When in the job hunting process should you tell them about your situation. Any feedback from those on a TN would be great!