I filed my taxes around 1am online and went to bed, when I woke up I looked over everything I did and I realized I screwed up big time. One of the questions asked was "IT-1040ES Estimated Payments Amount" and for some reason I entered my federal income withheld. I don't know how I made that mistake. Like I said, it was late and I was half asleep. Then it asked, "IT-40P Payments" and I entered my State income tax. For some reason I must've thought it was asking me how much I was withheld from federal and state. I confirmed everything and it's filed. It's Sunday so I don't know if they saw it yet but I really need to know how I can fix this. Do I need to call someone? What will happen to me since I messed up so badly? It says my return is a little over 1,200 and I only paid 177 for state taxe. Please help ASAP!

I hope these two sites can provide some useful information for you.

Frequently Asked Questions - 1.3 Amended Returns & Form 1040X (http://www.irs.gov/faqs/faq1-3.html)

Telephone Assistance (http://www.irs.gov/help/article/0,,id=96730,00.html) - Contact info

You wll need to amend BOTH returns UNLESS the error caused them to be rejected.