In that instance, if your business address is affected by the disasters the deadline should be pushed to October 16th, but if it's not your deadline is still 4/18/23.
Per the IRS (in the notice from your link):
Among other things, this means that eligible taxpayers will also have until Oct. 16 to make 2022 contributions to their IRAs and health savings accounts. (This will include all retirement contributions that originally had the 4/18/23 deadline)
@artrilla
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