As an active investor, be aware that your category Box A or Box D sales without adjustments do not require Form 8949, so there is no reason to import or key in those transactions.
Instead use the "enter a summary" option to put your numbers on Schedule D Line 1a or Line 8a.
No mailing is necessary.
TurboTax now takes advantage of this rule and suppresses some line item details entered by you.
Based on prior forum complaints about this. it's not clear exactly what rule it is using, and there is no way to force TurboTax to list all transaction details on Form 8949, as allowed by IRS.
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Check your subtotals for Box Categories on Schedule D, If the amounts agree with your broker's consolidated 1099-B your return is correct and you can e-File it.
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You might as well start off with aggregation as your reporting method of choice.
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For the other categories, B C E F,
IRS requires details of your SELL transactions to be supplied on some Form 8949,
or on your other forms (e.g. consolidated 1099-B or spreadsheet) which have the same information and in the same manner as Form 8949.
This is so, even when the broker has sent details to the IRS already.
@Cinna13604
