Please post a link to this.
Petitions do not get mailed to service centers. They get mailed to lockboxes, where they are dispatched to the service centers based on USCIS algorithms/metrics (i.e., not based on petitioner's state of residence).
Like others are suggesting, you are much better off filing online. Please read and research as much as you can about the entire process; it could save you wasted time and money.