I am hiring an employee with an Employment Authorization Card. Do I record the "A number" as their social security number? I am concerned about his W-2 being rejected at year end when we upload W-2's to the SSA website. Also, we bulk upload files to the SSA to verify social security numbers, will the A number reject or be accepted? If I do not use the A number as the social security number, what should I use?This is new to me so any help or direction would be appreciated. Thanks in advance for any assistance.