If you've made an error on a tax return you already filed or simply come across new information, such as a tax deduction or credit you now realize you qualify for, file an amended tax return to make the correction. The Internal Revenue Service (IRS) knows the tax code is complex, and that people make mistakes. The process for filing an amendment is straightforward. Simply file Form 1040X, Amended Tax Return, along with the corrected or additional documents you did not originally file with your return.
Congress has passed the largest piece of tax reform legislation in more than three decades. The bill went into place on January 1, 2018, which means that it will affect the taxes of most taxpayers for the 2018 tax year.