On reconciliation , how to change from Vendor to consecutive check number and date

It's good to see you in the Community, barbara41. 

We can modify the setting to succession orders of your check numbers and date on your reconcile page. Here's how: 

1. On the Reconcile page, click the setting icon.  
2. Tick box the columns you want to appear. 

In addition to this, I got you this article for additional reference in reconciling your accounts. This way, we'll ensure you reconcile your accounts effectively: Reconcile an account in QuickBooks Online. 

Also, I'm adding this great resource that you can read for future guidance. This link provides detailed instruction on what to do when your bank statement doesn't match your records in QBO: Fix issues when you're reconciling accounts in QuickBooks Online. 

Please let me know if you have additional questions or concerns, I’ll be here to help. Thanks for dropping by and take care!