Hello Shari,
I keep my clients records for one year. The time period may differ from each state or if your are an employee or if you are self employed and own your own business.
When in doubt, check with your local city, state, county, accountant and or attorney.
I don’t throw away their records either because there have been cases when some of these clients came back. Also, when I sold my old company I gave those records to the new owner.