QB Issue Resolution:

You can log in to your Intuit account to get your license and product numbers as well as a download link, or see the second link for downloads.

https://camps.intuit.com/app/selfservice/index.html#signin

https://downloads.quickbooks.com/app/qbdt/products

Resolution for Issue 'Can i get a replacement copy of my software? I had a problem migrating the software to a replacement (not additional) computer and now I have no access to my software.' available: Yes (Solved).
Source: Intuit Community forum.

Can i get a replacement copy of my software? I had a problem migrating the software to a replacement (not additional) computer and now I have no access to my software.: 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 computer
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