I just efile federal returns for the perpetual late clients.   They had a variety of 1099B stock sales transactions on their returns, which I reported properly on Schedule D, but in summary fashion, because I always attached the 1099 Schedule B form itself.    In my haste, I efiled these returns about a half hour ago, without attaching the Schedule B 1099 Form.   Is there anyway, I can pull back the efiled return, and sort of "cancel" that efile and do it again.   Or just not worry about it?   Thanks much.   Jeff