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You can add an Unique ID widget field to your form in order to add the hidden IDs.
If you would like to show the year of submission you can add it as Prefix. It will not be automatically updated, so you will need to change the prefix value once a year.
You will get the following numbers with this setup:
If you need any further assistance on this, please let us know.
On behalf of my colleague, you are welcome.
Do get back to us if you have any questions.