Where to continue the Attack on Titan manga

Attack on Titan by Hajime Isayama, 2009. The manga is complete at 139 chapters across 34 volumes.

• Season 1 (25 episodes): Continue the manga from chapter 34 in volume 8. The finale stages the action differently from the manga. For a clean handoff into season 2's story, keep reading from chapter 34.
• Season 2 (12 episodes): Continue the manga from chapter 51 in volume 13.
• Season 3 Part 1 (12 episodes): Continue the manga from chapter 73 in volume 18.
• Season 3 Part 2 (10 episodes): Continue the manga from chapter 91 in volume 23.
• Season 4 Part 1 (16 episodes): Continue the manga from chapter 117 in volume 29.
• Season 4 Part 2 (12 episodes): Continue the manga from chapter 131 in volume 33.
• The Final Chapters (2 episodes): You are caught up, the anime adapts the manga through chapter 139. This covers the manga to its ending, chapter 139.