Power to call for information enables tax authorities to require verified documents and use centralised processing to aid assessments. Power to call for information enables the prescribed tax authority to issue notices requiring persons to furnish specified verified information or documents relevant to any inquiry or proceeding; received material may be processed and utilised under a centralised processing scheme or other statutory provisions, with processing outcomes made available to the Assessing Officer. The Board may frame a centralised notice and processing scheme, which remains effective until replaced by a later notified scheme, and the term 'proceeding' covers pending, completed and subsequent proceedings for relevant years.