Who has the most passing touchdowns in the nfl?
This is a list of National Football League quarterbacks who have led the regular season in passing touchdowns each year. The record for touchdown passes in a season is held by Peyton Manning of the Denver Broncos who threw 55 in 2013. Six quarterbacks have led the NFL in passing touchdowns in four different seasons (Johnny Unitas, Steve Young, Brett Favre, Drew Brees, Peyton Manning, Tom Brady), and one player (Len Dawson) achieved the same feat in the American Football League, the AFL.
Who has the most passing touchdowns in a career in the  regular season in the NFL?
Drew Brees
List of National Football League annual passing touchdowns leaders
No context provided
Who has the most passing passing touchdowns in a career in the NFL, including playoff games?
Tom Brady
In the National Football League (NFL), eight quarterbacks share the record of having thrown seven touchdown passes in a single game. Sid Luckman was the first player to accomplish the feat, doing so on November 14, 1943, while playing for the Chicago Bears. The most recent seven-touchdown game occurred on November 1, 2015, when Drew Brees did so with the New Orleans Saints. During that game the two teams' quarterbacks combined for 13 passing touchdowns, setting another NFL record. Three quarterbacks on the list are in the Pro Football Hall of Fame: Luckman, George Blanda, and Y. A. Tittle. There was a 44-year gap between seven-touchdown games from Joe Kapp's in 1969 until 2013, when Peyton Manning and Nick Foles each did so just two months apart. Manning also holds the NFL record for touchdown passes in a season, with 55.
Who has the most passing touchdowns in a single season in the NFL?
Peyton Manning
List of NFL quarterbacks with seven touchdown passes in a game ...
List of NFL quarterbacks with seven touchdown passes in a game ...
https://en.wikipedia.org/wiki/List%20of%20NFL%20quarterbacks%20with%20seven%20touchdown%20passes%20in%20a%20game
List of National Football League annual passing touchdowns leaders
https://en.wikipedia.org/wiki/List%20of%20National%20Football%20League%20annual%20passing%20touchdowns%20leaders
List of National Football League career passing touchdowns leaders ...
https://en.wikipedia.org/wiki/List%20of%20National%20Football%20League%20career%20passing%20touchdowns%20leaders
and single-season passing touchdowns (55 in 2013).
Peyton Manning
Brady holds many career quarterback records, including passing yards (91,653), completions (8,542), touchdown passes (664), 
Tom Brady
Drew Brees has the most passing touchdowns in a career in the regular season in the NFL; however, Tom Brady has the most passing touchdowns in a career, including the regular season and the postseason, with 664. Peyton Manning holds the record for most passing touchdowns in a single season in the NFL with 55 in 2013.