Girls' Generation vocal sub-unit group TaeTiSeo (Taeyeon, Tiffany, and Seohyun) are indeed preparing for a nearing comeback in the second half of this year but not yet dated.

SM Entertainment told MyDaily on 6th, "It is right that TaeTiSeo are working on their new album, but we haven't decided the exact date of their comeback yet."

SM are currently preparing Taemin's solo debut and Super Junior's new album. It's been more than 2 years since they released their debut album 'Twinkle' on May,2012 but their comeback is definitely coming sometime in September.

Along with their planned comeback, TaeTiSeo are also planning to star in their reality program.