Please download the government rate of 2081/82 from this link.
Department of Land Management and Archive | Babarmahal,Kathmandu (dolma.gov.np)
if you want indvidual malpot office link then
www.dolma.gov.np/office/"Malpot office name"
for example Chabhil malpot office
www.dolma.gov.np/office/chabahil