You can change your date settings in QuickBooks Online by:
Select the Settings icon (top right), then Account and Settings.
Select the Advanced menu and click into the section Other Preferences.
Select your preferred date format, then Save and Done.
After changing this, you may need to refresh the page and/or sign out and back in to view the changes. Feel free to reply if you have further questions as I'm here to help!
-Kass
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