After you file

@JustinYoo  The IRS is woefully backlogged.  Assume that amendments will take 9-12 months (no kidding) to process.  Note the IRS website (see @DoninGA 's message above) states "more than 20 weeks" and that statements doesn't include an upper limit.  From others who have posted (including my own experience) 9-12 months appears what it is running,