Thanks for reaching out! To make sure I point you in the right direction, could you let us know what you're trying to sync in QuickBooks Time?
If you're looking to manually sync data between QuickBooks Time and QuickBooks Online, you can do so by:
In the upper right corner of QuickBooks Time, select QuickBooks > Import.
You can also check out this article for more details: Import data to QuickBooks Time from QuickBooks Online.
Looking forward to your reply so we can assist you further!