If QuickBooks can’t find a matching transaction, or finds one that’s incorrect, you can search for a better match. Here’s an article that will help you out:
Resolution for 'balance bank issue: 'how to balance bank' available: Yes.
The balance bank issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the balance bank issue yourself by looking for a resolution described in the article. If it is a complex balance bank issue or you are unable to solve the issue, you may contact us by clicking here or by using other balance bank support options.
For more information about resolving issues related to balance bank in Quickbooks/QBO or to get support for the issue 'how to balance bank', click the link below: