Nanny need advice!

Hello, I hope I receive some advice. I provide childcare for 2 families. It's a part time job and receive payment in cash from both families. I am being audited by the state of Maryland. They are requesting that I provide address and social security numbers from these families. I asked them if they are willing and of course they are very hesitant to do so. I have never gave them my social security number. Thank you!

Regards,