Year-end tax preparation is essential for Amazon sellers who want to stay compliant with tax laws and reduce their tax liability. By organizing financial records, tracking expenses, staying on top of sales tax, calculating COGS, and planning for estimated taxes, you can ensure a smooth and efficient tax filing process. Whether you use accounting software or consult with amazon seller accountant, taking a proactive approach to year-end tax prep will save you time, money, and stress as you close out the year.