Taeyeon is gearing up for her upcoming comeback.
According to XportsNews on May 25th, Taeyeon departed to the US last week and secretly filmed her new music video there for 4 days. She already returned to Korea on May 23rd.
Following this, SM Entertainment stated that her comeback schedule will be revealed soon once it's finalized.
Meanwhile, Taeyeon will hold her solo concert 'Butterfly Kiss' this July and August.