Hi @Sandy Debolt ,
I suggest you refer to this support article about Quickbooks compatibility with office versions, and there is no Office 2019 is listed:
https://quickbooks.intuit.com/learn-support/en-us/help-article/manage-integrations/microsoft-office-2010-2013-2016-365-faq/L1wGHbyB7_US_en_US
I suggest you can also post this question to Quickbooks forum:
https://quickbooks.intuit.com/learn-support/us-quickbooks-community/misc/03/community-us
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thank you for your understanding.
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
If the response is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.