I had to file by mail because I moved to a new state and got 2 W-2s for the same job, of which the W-2 for the former state left the federal fields (1-13) blank. This weird W-2 apparently makes me ineligible for e-file.

Edit: In hindsight, I could have just waited until the start of 2025 to update my address in the HR system and gotten a single, normal W-2, but then I would be both violating the remote work rules (by not adding my new work location) and (probably) committing tax fraud.