QB Issue Resolution:

For anyone having this issue.

Within the “Taxes” tab, there is an options to “Enter Prior Tax History”.

If your tax payment isn’t registering and you’re still getting a reminder you can enter it in here for the relevant period and the reminder will disappear.

Resolution for Issue 'Our Federal Unemployment 940 is showing as unpaid 357 days overdue. It has been like this for over a year, despite the fact we ePaid through QB at the start of 2018.' available: Yes (Solved).
Source: Intuit Community forum.

Our Federal Unemployment 940 is showing as unpaid 357 days overdue. It has been like this for over a year, despite the fact we ePaid through QB at the start of 2018.: 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 Enter Prior Tax History
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Error Recovery for Enter Prior Tax History [Canada]
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