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A low-lying resonance in the system of four neutrons (tetraneutron) was first observed in 2016. The SS-HORSE method was developed to extract resonance energies and widths from the results of the No-Core Shell Model (NCSM) calculations. An extension of the SS-HORSE-NCSM formalism to the case of democratic four-body decays is the only formalism at the moment able to describe the tetraneutron resonance energy and width. New tetraneutron results obtained within this formalism with various NN interactions will be discussed.