Meaning when I filed my taxes in 2022, it was for Tax Year 2021. When I filed my taxes in 2023, it was for Tax Year 2022. When I filed my taxes in 2024 (last week), it was for Tax Year 2023.
It doesn't let me file it electronically...I think IRS doesn't allowed that (or maybe because I mailed the original, the amendment needs to be mailed as well).