Enables phosphoprotein phosphatase activity. Acts upstream of or within negative regulation of BMP signaling pathway; positive regulation of protein export from nucleus; and protein dephosphorylation. Located in nucleus. Is expressed in several structures, including adrenal gland; brain; gallbladder; genitourinary system; and gut. Orthologous to human CTDSPL2 (CTD small phosphatase like 2). [provided by Alliance of Genome Resources, Apr 2022]