The word whereas, a combination of where and as, is a subordinate conjunction just as
where and as are subordinate conjunctions. It is in the same category as and is
punctuated like clauses that begin with before, after, since, because, where, and as.
It is NOT a conjunctive adverb. It is NOT in the same category as and is not punctuated
like however, moreover, consequently, and therefore.
Therefore, it does NOT take a semicolon in front of it and a comma after, and it does NOT start a new sentence. It follows the punctuation of an adverb clause
...The partners pay personal taxes whereas corporate taxes are paid by the company.
...Whereas corporate taxes are paid by the company, the partners pay personal taxes.
Happy punctuating!
Margie