30 Del. C. § 559

(a) If any person wilfully refuses to file a tax return required by this title or Title 4, the Director may apply to a judge of the Superior Court for the county in which the taxpayer (or other person required to file such return on behalf of the taxpayer) resides, or, in the case of a corporate taxpayer or a taxpayer that is a partnership, estate or trust, for the county in which such taxpayer maintains its principal office in this State, for an order directing such taxpayer or other person to file the required return. If a person fails or refuses to obey such an order, such person shall be guilty of contempt of court.

(b) If any person wilfully refuses to make available any books, papers, records or memoranda for examination by the Director, or the Director’s representative, or wilfully refuses to attend and testify, pursuant to the powers conferred on the Director by § 563(c) of this title, the Director may apply to a judge of the Superior Court for the county in which such person resides for an order directing such person to comply with the Director’s request for books, papers, records or memoranda, or for the person’s attendance and testimony. If the books, papers, records or memoranda required by the Director are in the custody of a corporation, the order of the Court may be directed to any principal officer of such corporation. If a person fails or refuses to obey such an order, such person shall be guilty of contempt of court.