hello,
you can try this and see if it works.
go to federal -> Stocks, Cryptocurrency, Mutual Funds, Bonds, Other -> go to each of your brokerage 'edit' -> under 'gain/loss' column, find '$0.00' and hit 'edit' for that entry -> scroll down to 'box 4 Federal income tax withheld'. it probably shows actual '$0.00'. but delete it entirely. do not put anything there. it seems turbotax would not take $0.00 entry. if you haven't withheld federal tax for your stock, or any investment buy/sell then this entry should be 'blank' in turbotax. let me know if this works.
