How can I restart a reconciliation? I would like to have the beginning balance show again.

Welcome to the Community space, @zion4. I'll share details to get back and see the beginning and ending balance of reconciliation inside QuickBooks Online (QBO).

Since you already started the reconciliation process, please know there's no option to start from scratch and reconcile the account inside QBO. If you forgot or accidentally entered an incorrect ending balance, click the Edit info button on the top right corner and see the beginning and end balance of the account. These are the steps:

1. Access your QuickBooks Online company.
2. On the left navigational bar, click the Transactions tab and choose Reconcile.
3. Select the account you're with, and then click the Resume reconciling button.
4. Click Edit info button and review the Beginning and Ending balance. You can also enter changes if needed.
5. Once done, click the Save button.
6. Proceed to finish the reconciliation.

Additionally, you can refer to this article in case you encounter issues after reconciling an account inside QBO: Fix issues at the end of a reconciliation in QuickBooks Online.

We're always around if you need further assistance managing or fixing reconciliation inside QuickBooks. Don't hesitate to comment below so we can respond right away. Keep safe, and have a good one. 

Thank  you - I will try that.