For starters, at least half of your US tax rates are either wrong or wrongly applied. Beyond that, you'd have to pay me to spend the time to detail all of the inaccuracies. My hourly rate starts at $300.
How about one example before I hire you? The US tax rate computation is based on the MIT Living Wage calculator for personal taxes, and ZenPayroll for payroll taxes.
http://livingwage.mit.edu/places/0607567000 https://zenpayroll.com/blog/the-true-cost-to-hire-an-employe...