How can I delete b2b invoice from GSTR1 ?

Click on Clean-up Portal Data button, and select the GSTR-1 file downloaded from Govt portal. This will generate a special cleanup JSON file in the same location as selected portal file. Simply upload this cleanup file to GST Portal and wait for 10 minutes. All your GSTR-1 data will be cleared on the GST Portal.

Sir I dont need to clear all GSTR1 data only 5-6 invoices are filed as outward supply instead of debit note ,need to remove/delete only those 5-6 invoices from previous quarter's filed GSTR1.