The income tax department has partnered with Infosys and Iron Mountain to store tax returns in secure, climate-controlled storage centers. Printed tax returns are barcoded and sent to Iron Mountain facilities, which also stores documents for famous individuals. The barcoding ensures anonymity while the documents are stored for six years then destroyed according to standards with income tax officials present. The Central Processing Center has processed over 415 million returns in the past three years much faster than previously.