QB Issue Resolution:

No, there is no cross platform function.

sales tax, addresses, etc are all too different to be able to change from US to global or the other way around

Resolution for Issue 'I have a query. Can I convert data from desktop US version 2016 to online international version. I tried but system converted to online US version. Any suggestion.' available: Yes (Solved).
Source: Intuit Community forum.

I have a query. Can I convert data from desktop US version 2016 to online international version. I tried but system converted to online US version. Any suggestion.: 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 cross platform
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Error Recovery for cross platform [Canada]
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