<human>: So, my father has been the sole owner/operator of his pest control business for around 25 years now, since his father passed and he took over it. I'm looking to start working in the family business too, and eventually take over myself. At first I'll continue to work my normal job as I build a customer base, and then quit and work it exclusively when it becomes enough to support me.

Now, here's the meat of my question: I have recently found out that my father has stopped not only paying taxes, but even filing at all, for at least 8 years. I myself always file and pay on time, and so I have no tax issues, but he obviously does and would face serious consequences if he were to be called out. Now, the family business being my best option, I want to start working, but I'm not sure how that will affect him and the business. I refuse to work under the table tax free, and of course I can't take over the business if I can't work. 

Now, my father would very much like to get back on track, and pay back taxes and start filing again, if not only for my benefit his as well. So, are there are IRS/Tax professionals out there who can tell me how he can go about doing this? I know that if you owe money, you can usually work things out / make some sort of payment deal, but what about not having filed at all?

Can you give me the gist of the text in a nutshell?
<bot>: I want to work for and eventually take over my fathers business but he hasn't filed or paid taxes in almost a decade, how can we sort this out?