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First let me say I cannot import this statement I have to do it manually for this specific institution.

 

My 1099-B states "report on Form 8949, Part II, with Box D checked".  I only realized this year Turbo Tax always marks Box E.  I have no idea why. I am hoping from what I see in this discussion that this will not cause a problem.  Every year I have to do a form 8453 and send through the US mail with documentation.  I am wondering if Box D was marked if I would not have to do form 8453.  I only ask because this year I did not do something correctly and I have to do an amended return to fix form 8949 to include long term sales.  If box D was marked would I still have to mail the 8453 with documentation?