The issue is usually whether the same owners or bosses control your work assignments. Courts generally cut through red tape like "Tax Id's" and look at the economic realities.
Definitely worth exploring with an OH lawyer, because you may be owed lots in overtime. The theory is "joint employment."
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The first answer is correct. If the two businesses are, in practical reality, the same - generally viewed as a matter of control over the day-to-day operations and who gets the profits from each business - then they could be treated as one business rather than two. You should really consult with a competent local attorney who has experience in payroll tax and employment tax matters to find out what the correct answer is based on all the facts of your case.
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