Case processing times depend on the location of the office, so you should check the processing time based on your application and field office. (You don’t have to visit an office to find out these times because they’re available on the USCIS site.) Given below are the processing times for three types of cases at the Dallas field office:
Naturalization (N-400): 14.5 months to 16 months
Certificate of Citizenship (N-600): 4.5 months to 12.5 months
Citizenship and Issuance of Certificate Under Section 322 (N-600K): 6.5 months to 25.5 months
The processing times USCIS provides are based on historical data captured two months before updating the site. For many types of forms, the time is given as a range, like the times shown above.
Through its website, the USCIS offers many tools that make it easy to follow the progress of your case. For starters, you can track the status of your case by providing your Receipt Number (the 13-character identifier you receive when you submit an application or petition).
If your case is taking too long to process, you can find out why by submitting an e-Request. Before submitting this request though make sure that your Receipt Number comes before the receipt date for case inquiries. (The date for case inquiries is given on the same page as the processing time for your case.)
When visiting the Dallas field office you’re required to observe certain guidelines: You’ll have to make an appointment because walk-ins aren’t allowed. You’re not allowed to do any audio or video recording while inside. Weapons and ammunition are also prohibited. More information about visiting is available here: Visitor Policy and Local Offices.