Thank you both for the quick response. Does checking the box "The cost basis is incorrect or missing on my 1099-B" inform the IRS that there is a problem? Since I am limited to the $3,000 annually capital loss write off, it won't be until the 2028 tax year that the capital loss carryover would impact the amount of tax I owe. By using the correct cost basis I will owe approximately $60 more in taxes than if I used the incorrect 1099B.
