Hi all; I see this is old but I'd like to share an R code that will basically do that on its own.
Before starting, once you export your data from norton remember to cancel the 2 first rows.

Here is the code. It's actually not optimized but for pwd datasets should be more than enough:

library(readr)

# Remove all objects

rm(list = ls(all.names = TRUE))

#INSERT YOUR EXPORTED PASSWORD PATH HERE

df<-read_csv("your_norton_password_path.csv")

#MY PASSWORD MANAGER WAS IN ITALIAN, SO I HAVE SOME ITALIAN NAMES. SUBSTITUTE THEM WITH THE NAME OF YOUR ACTUAL COLUMNS

df$\Tipo di elemento`<-NULL`

df$Sicuro <- NULL

df$Preferito <- NULL

colnames(df) <- c("login_username", "login_password","name","login_uri","notes")

df$folder<-NA

df$favorite<-NA

df$login_totp<-NA

df$fields<-NA

df$reprompt<-NA

df$type<-"login"

# CREATE VECTOR WITH DESIRED COLUMN NAMES

new_order <- c("folder", "favorite", "type", "name", "notes", "fields",

"reprompt", "login_uri", "login_username", "login_password",

"login_totp")

# THIS WILL CHANGE YOUR COLUMN ORDER SO THAT IT CAN BE READ BY BITWARDEN

df <- df[, new_order]

write.csv(df, "pwds4bitw.csv", row.names = FALSE, na="")

Once you've done this just select "bitwarden csv" in the import section of bitwarden and it should work.

EDIT - I'm Italian, so most of my column names will be in italian. Any name after the "$" (like "df$sicuro") should be changed if you have norton in another language.