@princesstiki1 

RE: So, it's February 2023 and I receive an invoice (called a "Bill" in QB parlance) from a vendor dated November 11, 2022. What is the solution? 

The date on the invoice/bill that your vendor sent you three months late isn't important to you. That's their date, not yours.

Usually, in this case follow the GAAP rule of discovery and enter the Bill on the date you received it - the date you discovered it existed.

Also you could ask your vendor why they didn't send you the bill/invoice for three months.

RE: Any decent system has an accounting date for a transaction as well as recording the date on the document.

I find that interesting, as several in this thread here have mentioned variants of that idea, but no accounting system I've ever used had that concept. I don't see the point, really.  How would this be helpful in your case, where your accounting period is long closed?  If one of those dates was during that period, then it would change your reports for the period, right? And if so, is seems that would defeat the point of closing the period.