The advantage of including taxes and shipping (typically corresponding to DDP or DAP terms) is that buyers see the final landed cost, making decisions simpler with lower barriers to trial orders. However, the risk is that you bear the burden of currency fluctuations, destination tax rate changes, and varying import fees across markets. If your quotation calculations aren't precise enough, profits can easily be eroded. Before designing tax-and-shipping-included quotations, confirm the actual tax rates, express reporting fees, and currency buffer margins for your destination markets, and specify the applicable scope in your quotation terms (for example, limited to specific countries or product categories) to avoid future cost disputes. It's best to set different conditions for different destinations rather than applying one quotation across all global markets.