Code V for reporting Section 199A income from a S corp is certainly supported now and can be entered into TurboTax for you personal tax return, but the calculation of a QBI deduction for income from an S corp is not yet supported. I'm not sure, but I don't think that TurboTax Business for preparing the tax return of an S corp has been updated for the new QBI-related codes yet.
Prior to 2018 code V was for Other Information. In 2018 Other Information is reported with code AC.
