I hope you kept accurate records, as the IRS looks at cash-based businesses carefully.
Any of your clients who wish to claim a tax break for Child Care will need your SSN. If you don't want to give it out, you can get an EIN from the IRS:
EIN FORMS GOV / EIN Online Application (ein-forms-gov.com)
Also see this:
2020 Publication 587 (irs.gov)
Your state may be different
