Hello Aspirant

I hope you are doing good . As per your query, I would like to inform you that their is no need of getting worry ,you should mail regarding your mistake and attach domicile certificate in it as a proof that you have informed and apoplogize them regarding your mistake. If they found out that you havent filled the form properly then will reach you out otherwise at the time of document verification you  can submit the orginals with the undertaking

Hope you found this answer helpful. Good luck for your future