New here have toilet issue.

[ShitShowIRL]

toilet hasn't been flushing well for awhile clogging on and off. had it installed less than a year ago and for the last few days it has been clogged and the upstairs shower/bathtub is having dirty water come up through the drain. Any advice would be appreciated! Have tried plunging and liquid plumber

 

[wood4d]

if the tub is backing up you have a clog in the main line the toilet needs to be pulled and the line snaked