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Level 1
March 11, 2026
Question

1099-B Acquired Date is Wrong and missing basis

  • March 11, 2026
  • 1 reply
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Imported a 1099-B and having an issue. The shares in question were transferred from one brokerage to another and the transferring brokerage did not include acquired date or cost basis information. My 1099-B shows the date the shares were transferred as the acquired date, and lists the cost basis as missing. I located the correct cost basis and acquired dates from the originating broker. When I check the "cost basis is incorrect or missing" box (to presumably create form 8949) there is no place to enter a corrected acquired date. I spoke with the broker who issued the 1099-b and they will not reissue a corrected form with a blank acquired date, even though they have no information and acknowledge that the basis data is missing and therefore should probably be blank. 

 

Question is, do I replace the incorrect dates directly on the imported 1099-B screen (desktop version) with the correct acquired dates? And do I update the "Sales Section" from short sale not reported to long term not reported? Or is there something I am missing that would allow me to insert correct dates and sale? 

1 reply

Level 15
March 12, 2026

Read the Form 8949 instructions for codes to use when fixing incorrect data. 

form 8949 instructions