As asked by @banana_girl in 2021, we need an official source for the original seasons.

Here is the official TNA site that breaks it all down by Year. The IMDB that shows the season 1 episodes. And the TVDB as an additional source.

https://watch.tnawrestling.com/section/iMPACT

https://www.imdb.com/title/tt0421463/episodes/?season=1

https://thetvdb.com/series/tna-impact-wrestling/seasons/official/1

@Copeland1994 said:

Here is the official TNA site that breaks it all down by Year. The IMDB that shows the season 1 episodes. And the TVDB as an additional source.

https://watch.tnawrestling.com/section/iMPACT

Unfortunately, this site doesn't mention any seasons. The fact that it display each year on a separate line doesn't necessary mean that each year is a season. By the way, this site has been created very recently. It was first archived in December 2023.

In the meantime, I have removed the duplicates, but we absolutely need informations from the time of the original broadcast.

https://www.imdb.com/title/tt0421463/episodes/?season=1

https://thetvdb.com/series/tna-impact-wrestling/seasons/official/1

Neither IMDB nor TVDB are official sources.

Thank you for removing the duplicates.