estimated tax penalty avoidance — need guidance ASAP

I'm dealing with a situation and need some guidance.

estimated tax penalty avoidance. I've been dealing with this for about 16 months now and the situation isn't improving.

I have already consulted briefly with a lawyer but the other party is not cooperating.

Has anyone been through something similar? What worked for you?

Following this thread — Subscribing to this thread. In a similar spot.