QB breaks standard accounting procedure by keeping a customer credit memo (you owe the customer) in the A/R account instead of a liability account.  The aging report does not use credit memos and only considers the invoice. So if you have customer credits the balance will be different

Resolution for 'balance will issue: 'Why the accounts receivable doesn’t match to the A/R ageing? Even using the report date method the don’t match' available: Yes.

The balance will 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 will issue yourself by looking for a resolution described in the article. If it is a complex balance will issue or you are unable to solve the issue, you may contact us by clicking here or by using other balance will support options.

For more information about resolving issues related to balance will in Quickbooks/QBO or to get support for the issue 'Why the accounts receivable doesn’t match to the A/R ageing? Even using the report date method the don’t match', click the link below: