Well after all the fun of calling government agencies and former employers, the mystery T4 slip does turn out to be regarding stock options. Which in a way makes me feel relieved that now I can fight Revenue Canada on a more level playing field instead of my word against their's. Yes it turns out that I owe them money but not the amount they claim. When they redid my taxes with this new T4, they added all the income frim it into my tax return but they didn't bother to include any of the deductions. Of course why bother taking deductions into consideration when you can gouge $3500 more dollars by ignoring them. Good to see Revenue Canada has number selective auditors going over tax returns to bloat money owed. And of course this whole mess would have been avoided if Getty had sent me a copy of the T4 in the first place. The accountant says that the T4 still looks like Getty didn't fill it out right for stock options but that would be par for the course with them. That all being said, I'm gonna run with the $500 tax bill and try to get out of this scrape alive.