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When do I need to include my 1099-B with my return?

SOLVEDby TurboTax656Updated February 20, 2024

The IRS will require a copy of your Form 1099-B if you’re reporting your transactions by sales section totals instead of reporting each one separately, and one of the following is true:

  • You made adjustments to your investment income.
  • Your cost basis isn’t reported to the IRS.

TurboTax will figure out if you need to provide the IRS with a copy of your 1099-B. If you do need to include this form, you’ll be prompted to upload a PDF copy after you enter your sales section totals in the investments section of TurboTax Online (TurboTax Desktop doesn’t support 1099-B upload). You can download or request a PDF copy of your 1099-B from your broker’s online account.

Here’s how to attach a Form 1099-B to your tax return in TurboTax Online:

  1. On the screen Now we’ll help you upload your 1099-B since the IRS requires a copy, select Browse to upload a PDF file of your 1099-B from your computer (you can also drag and drop the file into the upload box on this screen).
  2. When you see the message Upload successful! select Continue.
  3. If you select Skip and choose not to upload your 1099-B, you’ll see the screen How do you plan on submitting your 1099-B to the IRS? If you select I’m planning to upload a PDF copy later, be sure not to forget.
  4. On the Your investment sales summary screen (your screen might be titled Your investments and savings), if you have more investment sales to enter, select Add another sale or Add investments. Otherwise, select Continue.

Note: If you choose not to upload a PDF of your 1099-B in TurboTax Online, or if you’re using TurboTax Desktop, TurboTax will generate Form 8453. You can still e-file your return, but you'll need to mail a paper copy of your 1099-B to the IRS along with Form 8453, which you can print from your online account or from the desktop software.

Mail these completed forms to the IRS at the address below by the tax-filing deadline:

Internal Revenue Service
Attn: Shipping and Receiving, 0254
Receipt and Control Branch
Austin, TX 73344-0254

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