When TurboTax asks to enter Income Detail from Form K-3, it pre-populates the "Total" figure from the prior worksheets, then asks for the user to input the US Source / Foreign Source delineation. The "Gross Income Total" that this page pre-populates is incorrect. It appears to take the column F value from the Income information input prior, rather than column G which is the total. The user does not have the option to override this value.
This issue was raised here 2 years ago, but I am still having this problem today:
https://ttlc.intuit.com/community/taxes/discussion/where-can-i-find-gross-income-on-the-schedule-k-3...