Where to start the Death Note manga after the anime

Give it the last episode you watched. The mappings cover whole seasons. At a season boundary, the answer gives the next unread chapter; within a season, it gives a conservative starting point that may repeat material.

Every span the anime adapts

One row per season or film: the episodes, the chapters they adapt, and a note on where the boundary falls.

AnimeEpisodesChaptersNote
Death Note Full series1–371–107Wikiquote's transcription puts Light's death in chapter 107, 'Curtain'. Episode 37, the last, also ends on his death, though the anime stages it differently: Game Rant's comparison has him die alone on some steps rather than in the warehouse. Chapter 108, 'Finis', the last chapter of Vol. 12, is the manga's epilogue a year later, which ANN's Vol. 12 review noted the anime had not covered.

Every Death Note volume, with its chapters