Hello there, @mh991. I want to ensure this will be taken care of.
Thanks for providing details of the steps you've performed. Currently, the option to add a new field that contains dropdown lists in QuickBooks Time (QB Time) to replace Notes in QuickBooks Desktop (QBDT) is unavailable.
We'd love to hear more of your insights regarding this so I recommend sending feedback to our product developers. This way, they can further review this specific part of the program and consider adding your desired feature in future updates.
You can also look for a third-party application that can help you add the feature you need. To do so, simply go to our QuickBooks Apps store.
On the other hand, you can reach out to our QB Time phone support team to provide another workaround you can use in modifying the fields.
For reference about the integration, please check this article: Setup and use QuickBooks Desktop for Windows and QuickBooks Time integration.
I also added this helpful resource that you can use as a guide in managing custom fields in QB Time: Set up and manage custom fields in QuickBooks Time.
I'm always here ready to lend a hand if you have any other concerns about integrating QB Time into QBDT. Have a good one and stay safe.