QB Issue Resolution:

QBSE can not do any of that

If you want to track inventory for retail, QBO Plus is the only version of QBO that has inventory, or all versions of QB Desktop

QBO also has a/r and a/p and sales tax

There is no upgrade, there is no transfer transactions for QBSE to QBO or QBDT or visa versa.  You cancel QBSE and start a new subscription

Resolution for Issue 'I have the self employed version. I need to create item list and track act receivable. What version do I need for that and how do I upgrade my act?' available: Yes (Solved).
Source: Intuit Community forum.

I have the self employed version. I need to create item list and track act receivable. What version do I need for that and how do I upgrade my act?: 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.

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