QB Issue Resolution:

We are users like you and cannot access your file.   you need to contact payroll support for this issue.  I would remove the phone number in your question before people start calling you.

Resolution for Issue 'I want to cancel a pending 940 payment' available: Yes (Solved).
Source: Intuit Community forum.

I want to cancel a pending 940 payment: 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.

Support for 940 payment
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Error Recovery for 940 payment [Canada]
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