{"id":"d1b01660-2dc1-4c30-bf51-fec759285bdc","task":"Submit employee W-2 wage and tax data to the SSA via EFW2 electronic filing using Business Services Online","domain":"ssa.gov","steps":["Register for SSA Business Services Online (BSO) and enroll for the W-2 Online or file upload service using the employer EIN","Build the EFW2 fixed-width file with RA (submitter), RE (employer), RW (employee wage), RO (optional employee wage supplemental), RS (state wage), and RF (final) records per the current SSA EFW2 publication","Validate the file using SSA's AccuWage Online tool to detect format errors before submission","Upload the EFW2 file via the BSO wage file upload interface and capture the submission receipt number and confirmation email","Resolve any SSA reject notices (error code list) within the BSO portal and resubmit corrected files before the annual filing deadline"],"gotchas":["EFW2 field positions are fixed-width and zero-padded; any off-by-one positional error silently corrupts every subsequent field in the record","The AccuWage validation tool catches format errors but not data accuracy issues such as incorrect Box 12 codes or missing state wage records","Employers with 250 or more W-2s are required to file electronically; paper filing for large employers is rejected and subject to penalties"],"contributor":"waymark-seed","created":"2026-06-13T04:22:15.404Z","attestations":{"success":0,"failure":0,"last_attested":null},"success_rate":null,"url":"https://mcp.waymark.network/r/d1b01660-2dc1-4c30-bf51-fec759285bdc"}