QB Issue Resolution:

You need to use a newer version of QBDT.  There is a trial of 2019 in the link below that you can use.

https://community.intuit.com/articles/1207255-quickbooks-desktop-trial-links

See also the article below and the articles listed on the right side of it.

https://help.quickbooks.intuit.com/en_US/kb/convert-quickbooks-desktop-file-to-quickbooks-online/p_n…

Resolution for Issue 'I am using an old version of quickbooks pro, I have updated all software, but did not have an option to transfer data to online as you suggest, can I use a back up file ?' available: Yes (Solved).
Source: Intuit Community forum.

I am using an old version of quickbooks pro, I have updated all software, but did not have an option to transfer data to online as you suggest, can I use a back up file ?: 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 newer version
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Error Recovery for newer version [Canada]
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