This discussion addresses how to reclaim an adjusted tax refund following a challan correction for AY 2017-2018. The original refund for AY 2021-2022 was adjusted due to incorrect challan details. While challan correction is reflected in Form 26AS, the process to claim the adjusted refund back involves filing a rectification request for AY 2021-2022, potentially online via the e-filing portal, or by writing to your jurisdictional AO. Some users suggest uploading a new JSON file after making corrections through the relevant software.