Group 1 - The article outlines the steps for taxpayers to prepay taxes for cross-regional business activities using the new electronic tax bureau [1][3][5] - Taxpayers must log in to the new electronic tax bureau and fill out the "Cross-Regional Tax Matters Report" to report to the tax authority in their institution's location [1][2] - After completing cross-regional business activities, taxpayers are required to settle the tax payable to the tax authority at the business location [1][2] Group 2 - Taxpayers with existing cross-regional tax source registration can continue to prepay taxes through the new electronic tax bureau for ongoing cross-regional business activities [3][5] - Two methods are available for taxpayers to handle tax prepayment: using the new electronic tax bureau or visiting the tax service hall at the business location [3][4] - The procedures for subsequent tax payments are the same as those for newly added cross-regional business activities [5]