(Note: Episodes 317–342 are filler arcs like the "Zanpakutō: The Alternate Tale" and "Gotei 13 Invading Army" which do not drive the main plot.)
If you want to watch only the main story (canon) and skip the "filler" episodes that weren't in the original manga, use this list: bleach anime list of episodes
This comprehensive guide provides the complete Bleach anime list of episodes, broken down by major story arcs. Bleach: The Original Series (2004–2012) (Note: Episodes 317–342 are filler arcs like the