James Counts, a California CPA who sends out a daily newsletter that is often informative, related the following yesterday:

"Not sure if anyone is interested but I efiled my personal IRS 2020 tax return October 11, 2021 showing an overpayment and to be refunded  $519. The reason I mention that is I just got my refund in the mail dated 8/16/24 for that plus interest of $106.88. I guess this is proof that the IRS is catching up with their backlog."