Let me clarify my original question. I have one short term stock sale through JP Morgan where the cost basis was NOT reported to the IRS. However, on my Form 8949 - Box B, it already shows the correct proceeds and cost basis. On the bottom of the Capital Assets Worksheet it says "Taxpayer must mail in a statement with more details".
TurboTax automatically printed a form 8453 with the applicable box checked for Form 8949. Am I to submit the Form 8453 together with a copy of my Consolidated 2023 Forms 1099 and Details report that I received from JP Morgan? Does the IRS want this entire report (with many other trades where basis WAS reported), or just the single page that shows the one trade where basis was not reported?
Thank you for your help!
