Yes, you can enter Sales Section totals as one line item, but you're correct that sales that need Cost Basis Adjustments need to be individual. However, there is a way to import your transactions in TurboTax Online and then save the tax file to your Desktop product. You may end up needing to make manual adjustments to those sales anyway, if they are flagged in Review. Here's more info on How to Enter a Summary in Lieu of Individual Transactions.
Another option is to enter Sales Section Totals (including wash sales), and then mail a copy of your 1099-B and Form 8949 after you Efile. The IRS already has a copy of your 1099-B's anyway.
If you're e-filing, you only need to mail the IRS a copy of your 8949 if you entered sales section totals for one or more sales categories and one of the following is true:
- The sales category for one or more summaries is something other than box A (short-term covered) or box D (long-term covered), or
- The box A or box D summary includes adjustments (typically listed in boxes 1f or 1g on your broker statement)
Here's more info on Mailing Form 8949 for Summary Totals.
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