The data on the reconciliation report is not editable, jdmason59. What you can do is un-reconcile your transactions, and reconcile them back to get a new report.
Unreconciling your transactions mean replacing the R (reconciled) mark with C (cleared) or blank. You'll want to do this to all transactions within the period covered in the report. But in your case, you can base it on your bank statement's period. Please check the detailed steps in this article: Undo and remove transactions from reconciliations in QuickBooks Online.
If you have an accountant user (firm), you can let them un-reconcile your transactions. They have a tool to undo everything on one go.
We'll be with you till you can successfully correct the period date of your reconciliation report. Always ask anytime you need help.
