2018 Natural Disasters Tax Relief Act This bill permits penalty-free distributions from tax-exempt retirement plans for disaster-related purposes. It also allows an employer whose business was closed during a natural disaster an employee retention credit for 40% of the first $6,000 in wages paid to an eligible employee. The bill allows a temporary suspension of limitations on charitable contributions made for relief efforts in one or more qualified disaster areas and sets forth special rules for personal casualty losses and for determining the earned income tax credit for individuals residing in qualified disaster areas or zones. The bill provides for a mandatory 60-day extension of certain tax deadlines for individuals and business owners in a disaster area.