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Also, when importing a W-2, be sure to verify the employee info as it is not shown by default in TT 2024. Edit the W-2 entry and click "Show employee info" at the bottom of the first screen to see it:

This is where I finally found the mistake which was causing TT to give this error. It was initially confusing because when TT displayed the error it showed the top of the W-2 form which only contains the address of the employer. That caused me to think the error was in the employer's address and I got stuck on that for a while. But once I had scrolled through the rest of the form I immediately saw the mistake in the employee address section.