What is the deadline for filing state taxes in South Dakota?

The deadline for filing state taxes in South Dakota is April 15th. South Dakota follows the federal tax deadline, providing taxpayers with the same filing day for both federal and state taxes. However, if April 15th falls on a weekend or a holiday, the deadline is extended to the next business day. It is important to note that this deadline applies to both paper and electronic filing methods. Taxpayers are encouraged to file their state taxes by the deadline to avoid any late filing penalties or interest charges. It is also recommended to file electronically, as it is the fastest and most secure way to submit tax returns and receive any refunds.