I’m using Zoho Books to push my transactions to the IRP portal, and I’m filing GST from Zoho Books. Since the e-invoiced transactions will get fetched to the GST portal, what will happen if I push the B2B transactions again to the GST portal from Zoho Books?

Transactions pushed to the IRP will sync with the GST portal after 24 hours. If you push the transactions to the GST portal for filing GSTR 1 from Zoho Books, any transactions that were synced from the IRP portal will be overwritten.