# USCIS Information & Links ## CONTACTING USCIS
 | [****Contact U****](https://www.uscis.gov/about-us/contact-us)[****SCIS****](https://www.uscis.gov/about-us/contact-us) |
 | [****USCIS Freedom of Information Act (FOIA****](https://www.uscis.gov/records/request-records-through-the-freedom-of-information-act-or-privacy-act)****)**** |
 | [****Immigration and Citizenship Data****](https://www.uscis.gov/tools/reports-and-studies/immigration-and-citizenship-data) |
 | ****Practice Civics Test Mobile App**** Download our free civics study app at Google Play or the App Store. Search “USCIS civics test” and make sure USCIS is the developer. |
 | [****Practice Civics Test****](https://www.uscis.gov/citizenship/civics-practice-test-2008) |
 | [****N-400 Early Filing Calculator****](https://www.uscis.gov/forms/uscis-early-filing-calculator) |
 | [****Naturalization Eligibility Tool****](https://www.uscis.gov/node/93192) Check your eligibility and file your N-400. |
 | [****Office Locator****](https://www.uscis.gov/about-us/find-a-uscis-office) | ||
 | [****Class Locator****](https://my.uscis.gov/findaclass) | [ ](https://www.uscis.gov/forms/filing-fees) |
 | [****Find a Doctor****](https://www.uscis.gov/link/47752) |