QB Issue Resolution:

QB only works on a monthly calendar, you can not set the day of the month it ends

to get that info in financial reporting you will have to manually set the date range on reports

I would use November

Resolution for Issue 'My company fiscal year is not the end of the month. How should I set the fiscal year?' available: Yes (Solved).
Source: Intuit Community forum.

My company fiscal year is not the end of the month. How should I set the fiscal year?: 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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