Brave saving banking info - can't delete

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So I was presented with another intuit invoice recently

  1. invoice (located at [something].intuit.com) has checking number as a mini-pop-up /drop down [thing] right below the field
  2. “Open link in private window” ALSO has that info in a mini pop up / drop down
  3. clear cookies from that site, block that site from using cookies - info still there
  4. No sites listed as being able / not able to use Javascript in the Brave settings
  5. Clear all browsing data - now it’s gone

Anyway, I am still not understanding where / how this data is being saved, and how to nuke it individually. Unfortunately I can’t find out until the next invoice if it is being saved again or not.