Predicted to enable RNA polymerase II CTD heptapeptide repeat phosphatase activity. Predicted to be involved in dephosphorylation. Predicted to act upstream of or within negative regulation of BMP signaling pathway; positive regulation of protein export from nucleus; and protein dephosphorylation. Predicted to be located in nucleoplasm. Orthologous to human CTDSPL2 (CTD small phosphatase like 2). [provided by Alliance of Genome Resources, Apr 2022]