The IRS will require a copy of your Form 1099-B if you are reporting your transactions by sales section totals instead of reporting each one separately.
TurboTax will figure out if you need to provide the IRS with a copy of Form 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 CD/Download doesn’t support 1099-B upload). You can download or request a PDF copy of your 1099-B from your broker’s online account. If you are unable to upload a PDF of your Form 1099-B in TurboTax Online, or if you are using TurboTax CD/Download, 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.
See the link below which provides useful information on Form 1099-B including mailing information for a PDF copy of Form 1099-B.
How to include Form 1099-B with Return
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