Group 1 - The article discusses the requirements for taxpayers to register as general taxpayers if their annual taxable sales exceed the threshold set by the Ministry of Finance and the State Administration of Taxation [3][4] - It specifies that the annual taxable sales amount is calculated based on the cumulative taxable sales over a continuous period of up to 12 months or four quarters, including various sales adjustments [3] - The article highlights that for taxpayers with deductible items, the annual taxable sales are calculated based on the sales amount before deductions [3] Group 2 - Taxpayers must complete the necessary procedures within 15 days after the end of the reporting period in which their taxable sales exceed the specified threshold [4] - The small-scale taxpayer standard is set at an annual taxable sales amount of 5 million yuan or below [5]