QB Issue Resolution:

All version of QB supports only 2 decimal places.

Resolution for Issue 'Does the international version support more than 2 decimal places all across the system? DO you have inventory and service modules?' available: Yes (Solved).
Source: Intuit Community forum.

Does the international version support more than 2 decimal places all across the system? DO you have inventory and service modules?: 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 international
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Error Recovery for international [Canada]
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