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If you have confirmed the file is from a legitimate, trusted source (such as a private tax professional you are actively working with), follow these steps based on your device: Windows 11 has built-in support for extracting .7z files. Right-click the taxInstructions.7z file. Select Extract All… .

: Always run the file through updated antivirus software before attempting to extract its contents. How to Open a .7z File Safely

: The IRS never sends unsolicited emails with attachments. Official IRS tax instructions are typically hosted directly on IRS.gov as PDFs, not as .7z archives.