S. 143 : Assessment – Reassessment – Notice- Reassessment order was passed against an amalgamated company (Non -existing ) company – not procedural defect – Mere participation of the assessee in the assessment proceedings is of no effect as there is no estoppel against law- Such a defect cannot be cured by invoking section 292B – A Writ Petition can be filed in the Bombay High Court against an order passed in Delhi if the assessee is based in Mumbai. The litigant has the right to go to ‘a Court’ where part of cause of action arises. [ S. 147 ,148 , 292B , Art , 226 ]