You can find the list of your contributions
On the main page of the website.
In the admin panel for authors.
(Website) In My Tabs > Contributions
(Mobile App) Tabs section > In My Tabs > your contributed tab will be marked with a human icon next to the tab
Note:
If you were registered and logged in when you sent us your tab, you will receive an email notification on whether your contribution was accepted or not.
In case you were not logged in or your email was wrong you will never get a notification. You can only monitor if the tab you made appeared in our catalog.
We update the Ultimate Guitar archive every day. Even on the weekends.
You also won't get any notifications if you turned off the notifications. You can check that out and update your UG account's email address here.