Originally Posted by hwichlaz:
California Lic. requires 3 years. I put them at the back of my accordian file all together for 3 years, then in a box in the shed until it gets full. At that point it's fire starter. That way I'm covered for both licensing and IRS audit.
Thanks! My state doesn't have anything in the regulations handbook on how long to keep them. 3 years sounds like a good rule of thumb.