Overpayment letter from the unemployment office after 9 years as a school bus driver

The agency says I reported earnings incorrectly, but I think I followed the instructions. I worked as a school bus driver before this. I did not notice any errors at the time. Are payment plans possible?

Keep everything in writing and save the confirmation numbers. It made the follow-up calls so much easier.

If you are unsure, free legal aid in your area may help for this kind of notice.