Regarding stock and options, for Box A and Box D, only wash sales or other adjusted transactions have to be itemized on Form 8949.
The other transactions without adjustments can be aggregated. Report the sub-totals of cost and proceeds for those transactions on Schedule D Line 1a or Line 8a respectively.
If you have no wash sales, there will be no form 8949, No attachment is necessary. No mailing is necessary
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If you traded the same option frequently, you probably generated many Wash Sales.
That complicates reporting.
@drliz0149