You can know exactly what was sent to the IRS. Form 8949 is part of the tax return and was sent to the IRS and is populated with exactly what you entered. If you entered each individual sale, and did NOT summarize as you indicate, there is nothing to mail to the IRS.
TurboTax will send any form that has a number, any Schedule that is being used in your tax return such as Schedule A if itemized deductions were used, and any statement (not common) that must be part of the tax return. Worksheets are not part of the tax return. If you choose to print your tax return, and select 'All official forms required for filing' you will see the list of forms and schedules that would be part of the tax return filed with the IRS.
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