Demand Notice after refund of tax

A client filed the wrong Income Tax Return (ITR) and received a refund, but has now been issued a demand notice for the same amount after the revision and rectification deadlines passed. The discussion explores potential solutions such as filing an updated return under section 139(8A) or considering an appeal before the CIT(A). However, the high cost of litigation relative to the £10,000 dispute amount is also noted as a significant factor.