Last date for filing GSTR-3B for July 2023 was 25th August 2023 for those who didn't want to claim transitional ITC by filing form Tran-1. Assesses who want to claim transitional ITC by filing TRAN-1 have time till 28th August 2023. The date was extended because GST portal was not ready with forms needed for claiming transition ITC and also the portal could not handle the load and crashed for almost 2 days as the original due date approached. Even the payment gateway could not come up and many transactions failed. But the government never accepted its fault or lack of preparedness and gave it's own version for extending the date.