QB Issue Resolution:

Perhaps you already have a sub account named this but it is inactive? Click the view menu at the bottom of the chart accounts and make sure its set to All Accounts.

Resolution for Issue 'Entering Chart of Accounts under Real Estate Taxes, I have sub accounts of Village Tax, County Tax, – I am trying to enter School Tax the same way and it refuses to accept School Tax as a sub Account of Real Estate Taxes.' available: Yes (Solved).
Source: Intuit Community forum.

Entering Chart of Accounts under Real Estate Taxes, I have sub accounts of Village Tax, County Tax, – I am trying to enter School Tax the same way and it refuses to accept School Tax as a sub Account of Real Estate Taxes.: 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 Chart of Accounts
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