In the absence of additional information, I.E. type of filer, "Sole Proprietor, PTR, Corp, LLC"  I would say that the aggregate income from the business is the defining factor to consider in the Sec. 199A deduction. If the income limitation is breached or above, then no Sec. 199A would apply. Each system may be unique for it's application and use, however the income derived as a whole would determine the limitations.