It depends. If you used TurboTax Online last year, you should have been prompted to include Form 1099-B, with instructions to upload the form. The PDF should have been included in your e-filed return. However, TurboTax for Desktop doesn't support 1099-B upload.
According to this TurboTax article:
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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