S. 250 : Appeal-Commissioner (Appeals)-Procedure-Delay of 9 years in filing appeal-Order sent to E-mail ID of accountant who had left job-Assessee came to know when refund of AY 2019-20 was proposed to be adjusted against demand of AY 2010-11-Assessee filed affidavit. Sufficient cause for not filing appeal within time. Matter remanded back to CIT(A) to pass order on merits, denovo. [S.80IB ,245, 251, Limitation Act ,1963 S.5]