Online sellers can effectively manage sales tax in Massachusetts by: - Monitoring Sales Thresholds: Regularly track sales volumes to determine if they meet the $100,000 sales or 200 transactions threshold. - Registering Promptly: Obtain a Sales and Use Tax Permit through MassTaxConnect once thresholds are met. - Implementing Tax Software: Use automated sales tax software to accurately calculate and apply the 6.25% tax rate on taxable sales. - Leveraging Marketplace Facilitators: Ensure platforms like Amazon or eBay are correctly handling tax collection if applicable. - Maintaining Detailed Records: Keep comprehensive records of all sales and taxes collected for accurate reporting and audits. - Filing Timely Returns: Submit sales tax returns regularly based on filing frequency and remit taxes on time through MassTaxConnect. - Staying Informed: Keep up with any changes in tax laws or rates to maintain compliance and adjust systems accordingly.