Tax Collected at Source excluded from GST valuation; treated as interim levy not part of supply value. The corrigendum corrects earlier guidance and, after consultation with the CBDT, clarifies that Tax Collected at Source (TCS) under the Income Tax Act is an interim levy on potential income and not a tax on goods; accordingly, TCS is not includible in the value of supply for GST valuation and should be excluded when determining taxable value.