Where do I find the my filer’s federal identification number

[CarolynM]

If you mean your confirmation of filing, it was sent in an email.

If you mean the federal id number to complete the return, this is either the SSN of the individual for whom you are filing or the EIN of the business for which your are filing.

If you mean the number for the who sent you a tax form, the EIN for payors on tax forms is typically near the top on tax documents.