There's no need for concern.
Form 1099-MISC isn't a document that's required to be attached to a return, either paper-filed or eFiled. It's not something the IRS is looking for, and it wouldn't be attached to your return, regardless.
See Assemble Your Return in the Instructions for Form 1040 for more information.
All the IRS is looking for is that you actually reported the income from your Form 1099-MISC.
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