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4/15/2023, I paid my taxes and on my BBP business card and I got my 15k membership rewards.
State, not Federal, but...
Amex Delta retention 30k posted for a 7/19 California FTB payment via ACI.
I know this is an older post I but I paid my Federal taxes last week with the Blue Business Plus card for roughly $5k. My spend requirement was $8k. I had about $4k in spend before the tax payment. A few days ago the 50k MR points showed up on my account.