QB Issue Resolution:

Let me help you resubmit the e-payment for your 940 form.

Go to the E-Payment History window in the Payroll Center.
Under the Status column, if the status is Agency Rejected, then the agency has rejected the payment and sent a reason code and possible solutions.
Click the Agency Rejected link.
In the E-payment Rejected window, review the payment information and the problem and solution messages sent by the agency.
Click Void Rejected E-payment.
You may now either resubmit the e-payment or create a printed liability check. If you choose to resubmit the e-payment, it is important that you check the status again after resubmitting.

I’ve attached a screenshot for your guide. You can also check this article for more information about E-Payments Reject.

As always, if there’s something that you want to ask, just click comment below. I’m always here to help.

Resolution for Issue 'How do I resubmit my Q2 Federal 940 deposit? It was rejected. I have not had a problem E-filing in the past.' available: Yes (Solved).
Source: Intuit Community forum.

How do I resubmit my Q2 Federal 940 deposit? It was rejected. I have not had a problem E-filing in the past.: 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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