Hello dear,

After you submit the form and the required documents ,your biometrics will be verified at the enrollment centre itself ,
Your thumb impression will be verified .
Once your biometrics are verified you will be given an acknowledgement slip .
Usually it will take 2-5 working days for the updation to happen,
However according to the UIDAI helpline information it may take upto 10 days also sometimes .

I hope the above information is useful to you,

Thank you !