How do I find my federal Id number for my unemployment

The federal ID number should be located on the 1099-G form. 

Where is my federal id number located on my 1099-G form

Another term for Federal ID Number is Taxpayer ID Number (TIN). Look for Recipient's TIN, on your 1099-G, to find your Federal ID number. It should be underneath the Payer's information at the top of the 1099-G (see image).