Complete Steps 3 through 4(b) on only one Form W-4. Withholding will be most accurate if you do this on the Form W-4 for the highest paying job.Compliance conference forms are available online and may be completed when all parties are ready. Documents that Establish Both Identity and Employment Authorization. The documents on List A show both identity and employment authorization. Please note we will need all of the above forms to be filled out along with applicable identification before we can begin to process your first pay. A Do you have any physical condition which may limit you ability to perform the job applied fo. If you are aged 14-17 you will need an employment certificate, also called working papers, in order to hold a job in New York State.