RC4018 Electronic Filers Manual for 2025 Income Tax and Benefit Returns
Chapter 1 - Electronic Records Preparation for 2025
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- PDF rc4018ch1-25e.pdf
Chapter 2 - EFILE Error Messages for 2018 to 2025
- HTML rc4018ch2-25e.html
- PDF rc4018ch2-25e.pdf
Last update: 2026-02-13
Previous-year versions are also available.