McV, since you haven't said what your citizenship is, or where the boat will be documented, or what your tax liabilities are (use tax versus sales tax versus other taxes) you've really presented no information that is relevant to taxes
being tolled on the sale of the boat.
If all of that is Greek to you...it probably means you're about to get yourself in deep kimchee with some tax authorities, who have loing arms and longer memories and are very good at finding and collecting taxes and penalties.
If you don't know what types of taxes are rquired in your venue, or what you tax liabilities are, or how your venue asseses taxes...
Does the phrase "deep kimchee" translate down there?