There is technically no "business support" in the sense that the representatives only handle issues with the business software or entity tax inquiries. You can contact Support via the link below and hope that you get someone who is familiar with entity income tax issues.
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
Otherwise, you can post more details on this board and, perhaps, someone can provide an answer or get you pointed in the right direction.
