if you can't get the 1099-B corrected use code B. what the IRS says to use if the tax basis is wrong. then follow these instructions
• If this transaction is reported on the 1099-B - type B or on the 1099-B - type E (proceeds but not tax basis reported to the IRS then enter the correct basis on the 8949 in column (e), and enter -0- in column (g).
• If this transaction is reported on the 1099- B - type A or on the 1099-B - type D (proceeded and tax basis reported to IRS) then enter the basis shown on the 8949 in column (e), and correct the error by entering an adjustment in column (g). (the adjustment ids the difference between the correct number and what was reported
PS Sold another Computershare long-held dividend reinvestment and they simply put N/A for basis. In that case I just put my calculated basis. yes if the type is C or F - neither sales proceeds nor tax basis reported to the iRS
