An Annotated EFW2C File: Follow One Correction

This fictional walkthrough corrects only Box 1 wages on a processed domestic W-2: $48,500 was reported, but payroll has substantiated $47,900 as the correct amount. Employer identity, tax year and all other reportable amounts are correct. It is an ordinary money correction, not an EIN change, a name-only correction or a response to an unprocessed-file rejection.

The field positions below come from the tax year 2026 EFW2C specification dated July 10, 2026. Confirm the accepted layout for the actual submission period and the applicable corrected tax year. SSA publishes annual formats, and some fields are valid only for specified tax years.

The minimal framework for this ordinary correction is RCA submitter, RCE employer, RCW employee, RCT total and RCF final. These are correction record identifiers. They are not the RA, RE, RW, RT and RF records used for an original EFW2 file.

RCA begins the file and contains the submitter information. RCE identifies the employer correction report. The employee's RCW follows inside that report, followed by its applicable totals. RCF is the final record, appears once and must have no data after it. When optional correction fields apply, the required RCO and associated RCU records must also be included in their prescribed positions. The example omits them because its single changed field is in RCW.

Section 5 of the EFW2C layout places originally reported wages, tips and other compensation in RCW positions 244-254 and the correct amount in 255-265. Each field is eleven positions. Encode the full amounts using implied cents and the specified zero filling.

244.......254 255.......265
00004850000 00004790000

The separating space in this teaching ruler is visual only. In the actual record, position 255 immediately follows position 254. This is a field excerpt, not a complete file or a record that can be uploaded.

Use a viewer that displays positions without stripping trailing blanks. Count the first character of the record identifier as position 1. An off-by-one ruler can make both money strings look plausible while putting their final digit into the next field.

The internal difference is negative $600, but no negative $600 value goes into the correct-wages field. The previous and correct values provide the offset-and-add information. For money fields not being corrected, follow the layout's blank-field rules rather than copying every current payroll value or filling every pair with zeros.

Unchanged money fields do not mean the employee identity can be omitted. The RCW layout requires correct identity information, including the employee's correct name and SSN. Use the field-specific instructions for previously reported identity when a name or SSN correction is involved. This walkthrough assumes those attributes already match, so it does not demonstrate an identity correction. Keep sensitive identity values out of teaching fixtures and shared screenshots.

Build RCT from the employee corrections contained in its report, using the corresponding originally reported and correct amount fields. For this one-employee example, the Box 1 pair totals are $48,500 and $47,900. Do not put the employer's complete annual payroll into the correction total when only this employee's field is being corrected.

For a larger report, reconcile each changed field's previous and correct columns separately before comparing the net difference. Opposite errors can cancel in a net total. Also verify that each employee appears once in the intended correction population and that optional employee records contribute to their appropriate optional totals. Preserve the original processed baseline and the approved correction worksheet alongside the generated record excerpts.

EFW2C uses 1,024-position records, with delimiter handling outside those data positions. Inspect the complete ASCII file against the current specification, including required employer, submitter and final fields. A pair of correctly formatted wage amounts cannot compensate for a missing employer boundary or wrong corrected tax year.

Run the correction test type in AccuWage Online, repair findings and retest the exact release file. Testing is separate from SSA submission. After upload, retain the actual acknowledgment and processing results. Provide the employee's corrected statement and track its furnishing separately. The tutorial excerpt, validation result and filing receipt each document a different stage.