I just replaced the harmonic balancer and now I’m the front I’m having a slight squeal when I accelerate and in the back of the engine it is smoking. I can’t seem to figure out what’s going on. Any ideas?

The smoke might be oil leaking.

The squeak might be the druvd belt slipping.

Both basic to determine maybe ask a car guy.

Assuming u r new to this.

Did you get oil, grease or coolant on the belt? And is the damper fully seated? Look at the alignment and see if the belt looks like it's being pulled outward compared to the other pullys. What did you use to tighten the bolt and did you keep the engine from rotating? The smoke at the back of the engine is most likely valve cover leakage. You also have coolant lines back there, but it should be pretty obvious if you are losing coolant.