Answers above are correct. Filing fee at this stage is $420.00, payable via personal check to "Department of Homeland Security" It has to be filed at the Chicago Lock Box. To make certain your petition is accurate and supported by correct documentation, you should enlist the services of an Immigration Attorney. Feel free to give my office a call for a consultation.
Nothing in this response to your posting on AVVO is intended or should be considered as legal advice to your specific situation. Our posting is intended to provide general information of interest to the public. Facts relevant to your situation and not disclosed in your posting may affect your specific legal rights and remedies.