A TSV file contains all data listed in columns, with each value separated from the next by a tab stop character. Each new line represents a new set of data.
For TSV files that include names with nicknames in quotes, make sure the fields in question are surrounded by single quotes, not double quotes.
Bad:
John "Johnny" Doe San Diego CA 27 M
Good:
John 'Johnny' Doe San Diego CA 27 M