QB Issue Resolution:

Yes you can do that.  You have 2 options actually.

 

If it’s just a handful of “test” transactions you’re going to enter, you can then go to each of those transactions and delete them individually.

 

Option #2 is you can purge your whole company file within the first 60 days.  This will reset your company file to the point where you first signed up.  Here is the article on that.    https://quickbooks.intuit.com/community/Help-Articles/Deleting-online-data-and-starting-over/m-p/186…

Resolution for Issue 'New User Question about initial set up testing' available: Yes (Solved).
Source: Intuit Community forum.

New User Question about initial set up testing: 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 Company File
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