All United States citizens and green card holders must file taxes every year as written in U.S. law. Yet, many individuals are unaware that they need to file, usually because they are unaware of the law. Thankfully, due to United States policy dual citizens will not be double taxed. To start the filing process, you will need your social security number and U.S. passport information. If you are in need of assistance and want to make sure that your taxes are filed correctly, get in touch with Expatriate Tax Returns.