As Mike9241 posted, you would probably do best to seek a tax professional in your area for help.
In my experience, once you file to elect to be considered an S-Corp for tax purposes you should operate your business like an S-Corp and file all applicable tax forms timely. So, I agree with Mike9241 in that you should have filed your Form 1120S for a short year (8/2021 - 12/2021), your 2021 1040 with no Schedule C, and you would then be set to file your 2022 1120S. Sending amended and late returns does not confuse the IRS.
@Confused605
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