Transitional credit portal reopening allows one-time filing or revision of TRAN-1/TRAN-2, subject to verification and documentation. GSTN will open the common portal to permit a one-time filing or revision of Form GST TRAN-1 and TRAN-2 during the reopened window. Filers must electronically sign submissions, upload the Annexure A declaration and TRANS 3 where applicable, and may edit forms only before clicking 'submit.' TRAN 2 claims must be consolidated into a single form with the last month shown as the tax period. Filers must submit a self-certified copy to the jurisdictional tax officer within seven days and retain supporting records for verification; accepted transitional credit will be posted to the electronic credit ledger after adjudication.