This discussion addresses the crucial question of when a service provider becomes liable to collect GST after exceeding the turnover threshold. The main query is whether GST should be charged on the current invoice that pushes the turnover over the limit, or from the subsequent invoice. Opinions vary, with some suggesting GST applies to the entire invoice amount once registration is mandatory, while others propose splitting the invoice or using a 'Tax Invoice cum Bill of Supply' to potentially exempt a portion.