Block assessment procedure tightens timelines and mandates electronic filing, broadening assessment to total income including undisclosed income
The clause establishes a restructured block assessment procedure triggered by search or requisition, requiring the Assessing Officer to issue a notice for a return in a prescribed form and manner with mandatory electronic filing for specified categories. Returns must be filed within a capped period, revised returns are barred, and furnished returns carry deeming consequences; prior supervisory approval is required before issuing the notice. The AO must determine tax on the basis of the block period, applying renumbered computation, penalty and procedural provisions "so far as may be," and may verify tax credits claimed against assessed undisclosed income.