GST amendment restructures input tax credit, recovery, penalties, and transitional relief under the Assam tax regime. Amends the Assam Goods and Services Tax Act, 2017 by revising the definition of Input Service Distributor, expanding the scope of section 9, and inserting section 74A for determination of tax not paid, short paid, erroneously refunded, or input tax credit wrongly availed or utilised for financial year 2024-25 onwards. It also confines section 74 to periods up to financial year 2023-24, modifies credit distribution, refund, appellate, penalty, and limitation provisions, and introduces transitional relief, waiver, and exclusion rules for specified GST matters.