QB Issue Resolution:

No, there is no undo in QB.

You can check the audit trail/log to find out some of the deleted transaction details if you need to

Resolution for Issue 'Can I restore accidentally deleted entries?' available: Yes (Solved).
Source: Intuit Community forum.

Can I restore accidentally deleted entries?: this 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 issue yourself by looking for a resolution described below. If it is a complex issue or you are unable to solve the issue, you may contact us by clicking here or by using other support options.

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Error Recovery for Can I restore accidentally [Canada]
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