“Section 143(1)”

Delay in filing appeals, when supported by sufficient or justifiable cause, should be condoned with a liberal approach to ensure substantial justice. This principle prioritizes the cause of justice over mere technicalities.

In a search assessment under Section 153A, additions can only be made for completed or non-abated assessment years if incriminating material relevant to those years is found during the search, although notice under Section 153A(1) is mandatorily issued for six assessment years preceding the search.

For revision under Section 263, the Assessing Officer's order must be both erroneous and prejudicial to the interests of the revenue; if either condition is not met, the revisionary jurisdiction cannot be invoked. An order is not erroneous merely because the Assessing Officer did not record the details of enquiries conducted, provided due enquiries were made.

A penalty notice issued under section 274 read with section 271(1)(c) is invalid if it fails to specify whether the penalty proceedings are initiated for concealment of income or for furnishing inaccurate particulars of income. This non-specification vitiates the penalty proceedings.

An appeal before the Income Tax Appellate Tribunal can be dismissed for non-prosecution or treated as unadmitted when the appellant fails to appear, cooperate, or show diligence, in accordance with Rule 19(2) of the Income-tax (Appellate Tribunal) Rules. The law aids the vigilant, not those who sleep on their rights.

Penalty under Section 271(1)(c) for furnishing inaccurate particulars or concealment of income is not automatically leviable if the assessee has made a full disclosure of all particulars and the addition or disallowance arises from a difference of opinion.

Where an assessee claims that investments were made out of own funds, interest disallowance under Section 14A read with Rule 8D may not apply if the assessee demonstrates the availability of sufficient interest-free funds to cover such investments.

A court or tribunal is not bound to answer a reference or adjudicate an appeal on its merits if the party at whose instance the proceeding is made fails to appear at the hearing or take necessary steps for its proper conduct.