QB Issue Resolution:
The problem was that some of the spreadsheet cells contained an incorrect formula (displayed as #REF!). As a result Quickbooks stopped importing, but didn’t show an error
Resolution for Issue 'Why is the data import wizard not recognizing my inventory file in the excel spreadsheet?' available: Yes (Solved).
Source: Intuit Community forum.
Why is the data import wizard not recognizing my inventory file in the excel spreadsheet?: 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 excel
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Error Recovery for excel [Canada]
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