Forgot to add information to electronically filed I-30

[ibulp]

Hello,
I'm a U.S. Citizen petitioned I-30 for my mother Online! I just realized I forgot to add one of my employers and I clicked No when it asked me if I have prior petitions which I do, I applied for my wife and her petition is currently at NVC!!
Is this bad?!!! Can I contact USCIS and tell them about my errors?! if yes, how?

Please advise as I'm deeply concerned.


Kind Regards,