In a 2011 interview, he described Taeyeon as a "smart" student, someone "unlike others who came to him with dreams of becoming a celebrity...
[she] wanted to be a singer and reach the top with her own talents." In 2004, he "wanted to acknowledge Taeyeon’s potential" by giving her the chance to be in his song "You Bring Me Joy".
Taeyeon's vocal received positive feedback from the song's composer Park Hae-woon: "She fully understood the song in its entirety and expressed each detail very precisely..though this song requires the lowest note that a female singer can produce, Taeyeon executed them perfectly." In April 2012, a Girls' Generation subgroup named TTS was formed with Taeyeon and fellow members Tiffany and Seohyun.
Their debut EP, Twinkle, met with much success and became South Korea's 8th highest selling album of the year.
Her other 2014 releases included "Colorful" for JTBC's campaign "The World Is More Beautiful Because We're Different" and "Love, That One Word" for the SBS's drama You're All Surrounded; the latter entered Top 10 on both Gaon Digital Chart and K-Pop Hot 100.
Taeyeon began working on a solo album in late 2014, believing her "right time" had come.
Her debut studio album My Voice (2017) and its two singles "Fine" and "Make Me Love You" achieved similar success.
As a solo artist, Taeyeon has received several awards, including four Golden Disc Awards, two Mnet Asian Music Awards, two Seoul Music Awards, two Seoul International Drama Awards, one Mnet 20's Choice Award, one Melon Music Award, one Cyworld Digital Music Award, and one Gaon Chart Music Award. Although her father at the time did not encourage Taeyeon to become an entertainer, he was persuaded by the school’s president to give his daughter a chance after she recognized Taeyeon’s "clean" voice.
Having learned the guitar for her character portrayal, she played the part of Kaoru Amane, a teenager who suffered from xeroderma pigmentosum.Apart from Girls' Generation's activities, Taeyeon also appeared in several solo appearances.She first contributed her vocals to "7989" (featuring Kangta), a track taken from both Girls' Generation's eponymous debut album (2007) and Kangta's fourth studio album, Eternity (2008).If you can feel a deep soul from a singer, that's 'K-Soul'." Since debuting as a member of Girls' Generation, Taeyeon has received numerous nominations and awards for her solo activities in original soundtracks, radio show hosting and musical theatre dating back to 2008.She has won two Best Female Artist at the Mnet Asian Music Awards, as well as Bonsang awards at the 25th Seoul Music Awards and the 30th Golden Disc Awards.This is a rather mature song, so I would be lying if I said I didn’t have my doubts, but she blew me away.