I only know mine. Never had a conversation with someone about this.
I've never seen anyone else's taxes, except ours. Oh, and the kids' when they were still at home learning how to file.
I remember a neighbor who always bragged about his "financial manager" who saved him a boat load of money. In the end the financial manager was ripping him off and he owed Uncle 11 years back taxes plus fines etc. Took him amny years to straighten that out. They never found the financial manger.
Well my oldest sisters ex didnt lile the tax man but they caught up with him and his thirteen thousand he owed