How can I bypass this? I have options trades with $0 cost basis (I sold options & they expired worthless). Do I have to enter the cost basis for each transaction?

[tony_marinucci-y]

I sold put options which expired worthless ($0 cost basis).  Turbotax wants me to enter the $0 cost basis for each of these transactions.  There are over 200 transactions. Is there a way to avoid this?

[fanfare]

Just keep going. You should find that the warnings are just that -- warnings.

[tony_marinucci-y]

Unfortunately, it wasn't just a warning.  We ended up manually entering the cost basis for each of about 230 transactions.  We also raised the issue with Morgan Stanley, who recently acquired E*Trade and that's where the problem began.