I need the cancelled supplier' GSTIN of the taxpayer 29BYYPS5219J1ZD

Select all GSTIN Values in GSTR2A/8A then go to data tab and select remove duplicates, then proceed with current seletion only to remove duplicate values. . Then, Copy all GSTIN from 8A and check for latest return filed in GST Doctor, you will get your answer.

You may also use Free GSTIN Validator Tool which takes some time but still faster. After removing the duplicates as mentioned in the above answer paste the list of gstins on https://gstdoctor.com/tools/gstin-validator to get real time status of each GSTIN along with reason of cancellation.