You already register with the IRS when you get an EIN, or have payroll, etc.

Accounting System with "Control" ChecksSoftware to manage revenues, expenses, payroll, and taxes, etc., and ability to verify receipts and transactions (the verification is done by upper management to check and validate the revenues and expenses)4.

For payroll, ask the seller for a staffing matrix, this lists each position working at the property and their salary. 

That makes me nervous - because if the investments could be proved up to sophisticated investors why hunt for the guy who gets excited seeing 45%?

They aren't sophisticated investors. 

You can see plenty of examples in these threads, where every contribution revolves around this same promotional angle:https://www.biggerpockets.com/forums/927/topics/1195612-the-...https://www.biggerpockets.com/forums/311/topics/1136123-what...https://www.biggerpockets.com/forums/48/topics/1103837-which...https://www.biggerpockets.com/forums/62/topics/1156841-scam-...https://www.biggerpockets.com/forums/44/topics/1159791-what-...https://www.biggerpockets.com/forums/79/topics/1121289-has-a...https://www.biggerpockets.com/forums/44/topics/1159791-what-...https://www.biggerpockets.com/forums/79/topics/32290-jack-bo...https://www.biggerpockets.com/forums/12/topics/938096-land-f...Given this pattern and the sophisticated marketing approach, I wouldn’t be surprised if "William Ferr" might actually be Jonathan Halves himself, or someone closely tied to his business.

Cross border taxation is very complicated, most developed countries like the US and Canada have sophisticated systems to ensure their residents pay taxes, and you are not likely to be able to achieve your goal of not paying Canadian taxes on Florida income while a Canadian resident. 

That’s all AI does for you.Companies try to sound sophisticated and technologically advanced with big words, making their so-called “innovative” systems look impressive.

Don't miss the forest for the trees.Set up last-minute payroll.

There are many buyers and sellers of sufficient sophistication not to require at least some of the typical bundle of services.