You may need to send the IRS form 8949 and Form 8453. If you e-file your return but choose not to report each transaction on a separate row (you entered a summary with adjustments) on the electronic return, you must attach Form 8949 to Form 8453 (or the appropriate form in the Form 8453 series) and mail the forms to the IRS.
If you're required to mail in forms 8949 and 8453, do so within three days after the IRS has accepted your e-file. Here's the mailing address:
Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254
In lieu of Form 8949, you can substitute copies of your year-end broker statements that show the individual transactions. You don't need to include unadjusted Box A or Box D transactions.
Mailing 8949 with Form 8453
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