Since around April 2019, my checking account has failed to reconcile.
There's a difference between the opening balance, shown in the first reconcile window, and the opening balance shown on the bank's printed statement. I do NOT synchronize this account online with the bank. All my entries are manual. I discovered that Quicken "un-reconciles" previously reconciled transactions and that these particular transactions had been mislabeled (by me) as "print" when they should have been "debit." I mirror all my checking transactions in Excel, so I know that my figures are accurate. All other accounts with this bank: savings and credit card, do not show this problem. There's a bit more detail, but I'll hold that for replies. My Quicken version is 2020 R26.23 Build 188.8.131.52