The deadline for filing state taxes in Hawaii generally corresponds with the federal tax deadline. This means that individual income tax returns are typically due on April 20 for the previous tax year. If the deadline falls on a weekend or holiday, the due date may be adjusted to the next business day. Additionally, Hawaii residents may file for an extension, which usually grants an additional six months to file their state tax returns. However, it is essential to remember that this extension does not extend the time to pay any taxes owed. Therefore, taxpayers should ensure they submit any payments by the original deadline to avoid penalties and interest. For the most accurate and up-to-date information, it is advisable to check the current web page of the Hawaii Department of Taxation.