A client's kids joined our summer camp for a week or so last year- he's asking for my EIN's number for childcare deduction on his tax return. When I called IRS they said this is a confidential number that I should be treated like SSN and not be shared. However, the client is insisting for a very long time now and sending me links stating that he needs this number and that all providers should provide their EIN number. I am confused. Please help.
