Once again the QBI has nothing to do with the itemized or standard deduction ... so call TT support where someone can actually look at your return and see your issue :
Please use the following link to contact Customer Support for further assistance.
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
How to change between the Standard Deduction and Itemized Deductions
https://ttlc.intuit.com/community/accessing/help/how-do-i-change-from-the-standard-deduction-to-item...
