Because your question relates to ESPP, make sure your cost basis includes the compensation income that was, or should have been, included in box 1 on your W-2. Your 1099-B may not reflect your correct cost basis. For an ESPP transaction, your per share cost basis is the exercise price plus the discount, which in most cases is 15%.
Assuming your gain/loss report reflects your true cost basis, is that cost basis the same as reflected on your 1099-B? If they don't match, then you will need to report the ESPP transactions as they appear on your 1099-B, and in TurboTax you will select the option to make the necessary adjustment to cost basis. After entering the adjustment to cost basis in TurboTax, Form 8949 will reflect that adjustment in column (g).
@TaxNewbe
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