I'm sorry you're having a crappy day. I know that everyone here can relate. I hate it when everything seemingly pours in at once.
1. Tax bill. Did ya'll file jointly or married separate? My opinion (not knowing tax laws) but if you guys would've split a return, then you both should split the tax bill. Also, call the IRS -- they do payment plans. Just sent SOMETHING by April 15th and they'll work with you to get it sorted out.
2. Focus on your job, 100%. Make it your new 180. I know exactly where you're coming from. My boss knows about my sitch, and was fairly sympathetic. However, he got seriously stressed out last month ago and lost his cool on me for taking a sick day -- speculating that my personal life was my problem, and that I needed to pull it together or I wouldn't have a job anymore. This was confirmed by HR -- as there was some talk about demoting me to a lower position. While it infuriated me (as one, truly had nothing to do with the other), I made sure that I stepped up my game and always put a happy smile on my face....even if I was gritting my teeth during it.
So sorry for what you're going through -- but I do know that things will get better.
M:32,H 32 T:10, M5 BD/H Move Out: 9/2014 - extreme anger H Mental Illness Diagnosis: 4/15 Served D Papers: 10/15 Divorced: 11/15