There's debate whether e-file is open for amended returns; the consensus is nope (but I suppose you could always just try it...). If you do, let us know.
The IRS is slow as molasses in Minnesota when it comes to paper filings, BUT they evidently don't really process amended returns that are e-filed very quickly anyway, from what I hear.
If I had one to file, I'd probably wait until 2.12.21 & efile it. YMMV
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