The press release for Supernatural season 14 episode 18.
 
SUPERNATURAL
“Absence”— (8:00-9:00 p.m. ET) (Content Rating TBD) (HDTV)
THE STATE OF BEING AWAY– Sam (Jared Padalecki) and Dean (Jensen Ackles) continue to worry about the condition of Jack’s (Alexander Calvert) soul. The episode was directed by Nina Lopez-Corrado and written by Robert Berens. (#1418). Original Airdate 4/11/2019.

Source:

The CW

 
So we still don't have a certainty about Jack's soul. At least he's not officially bad yet? Tell us what you think in the comments or in the discussion thread for episode 18