QB Issue Resolution:

Making sure your .CSV files are properly formatted is important.

Don’t worry if you’ve downloaded a .CSV file already and the formatting isn’t compatible with QuickBooks Self-Employed. You can use Excel to edit your file, or use an editor tool. I searched Google for a .CSV editor, and there appears to be tons of options out there for this.

You’re well on your way to importing your transactions. If there’s anything else you need help with moving forward, just let me know.

Resolution for Issue 'Try to import CVS file in QuickBooks Self-Employed but when I browse and select the file nothing happen' available: Yes (Solved).
Source: Intuit Community forum.

Try to import CVS file in QuickBooks Self-Employed but when I browse and select the file nothing happen: 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 CSV file
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Error Recovery for CSV file [Canada]
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