E-file Requirements: All filers who will be filing a combined total of 10 or more W-2s and 1099s are required to electronically file all infomation returns.
Registration is Required: Prior to uploading W-2 files you will need a BSO user ID. This ID is used as your signature when you file W-2s therefore each person filing W-2s and attesting to the accuracy of the W-2s will need his or her own BSO User ID.
To create and account on the Social Security Business Services Online (BSO) website