after entering the income for 17V (disregard the other items for now) later on you should be asked to enter the separate (QBI) items. TurboTax does not use 17V except to later ask for the QBI details
you can net 17AJ. TurboTax does not handle this item you might have to manually complete form 461 which Turbotax does not do. If you are required to file this form you will have to mail in your 1040.
Who Must File
File Form 461 if either (i) your net losses from all of your trades or businesses are more than
$305,000 ($610,000 for taxpayers filing a joint return), or (ii)
you would report a loss of more than $152,500 on any one of
Form 461, lines 1 through 8.
https://www.irs.gov/forms-pubs/about-form-461
