GST schedule amendments correct tariff codes and descriptions, adding photovoltaic cells and adjusting item classifications. Corrigendum effects targeted amendments across State GST rate schedules by correcting tariff codes, commodity descriptions, spellings and classifications. It substitutes specific tariff codes, inserts omitted items such as photovoltaic cells, broadens or narrows headings (including alternative chapter references), removes or rephrases certain entries, and clarifies optical fibre/cable and gaming machine descriptions. Amendments are organized by rate (2.5%, 6%, 9%, 14%) and specified as line by line textual replacements and insertions to correct and clarify taxable classifications under the original notification.