Rectification of mistake allows assessing officer to amend tax orders within statutory period, subject to notice and hearing.

Rectification of mistake authorises the Assessing Officer to amend his orders to correct mistakes apparent from the record within a specified statutory period, either suo motu or on the assessee's notice. Amendments increasing liability require prior notice and a reasonable opportunity of being heard and must be made in writing. Amendments reducing assessment mandate refund, while amendments enhancing assessment or reducing refunds require an order specifying the sum payable and application of the Chapter's collection provisions. Matters decided on appeal are not reopenable except as to issues not considered and decided therein.

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