if all goes well for Liverpool I think they can finish in the Champions League Zone next season.
I think they will do better than just merely qualify for the CL, i think Liverpool is going to be back in the picture to compete with Manchester City for the EPL title, Klopp has ample time to study his team and recruit the players he needs, and that is what they are doing already. Liverpool are not playing the in CL next season, thus they can fully concentrate on the EPL and give City a good fight. Next EPL season will be so interesting, City are going for their fourth consecutive EPL title, and all the teams will be out to stop them, it'd be so competitive.
It depends on how they make moves in terms of player transfers and whether or not they can improve the club for next season.
To be honest, competing for the trophy is still possible, it's just that they need a lot of changes from Klopp's sometimes easy-to-read schemes and some players who have declined in terms of quality. Currently the arrival of Mac Allister and Szoboszlai will clearly be a good thing for them to improve the quality of midfield and attack.
But that is only one possibility because we also have to consider the other possibility where they are the same as this season and struggle to navigate the season.
Btw Liverpool next season will only go to the Europa League not the Champions League so this could also make something different for Liverpool next season.