Resources

Explore our in-depth articles and resources on all aspects of sales tax, crafted by industry experts to provide you with the insights and guidance you need. From fundamental principles to complex scenarios, our content covers every angle, helping you navigate the nuances of sales tax confidently.

Last updated:

January 1, 2025

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Ecommerce

California Sales Tax Rules for Online Sellers

E-commerce sales are taxable in California. But this doesn’t mean that all online sellers must collect sales tax on every transaction involving a California customer.

SaaS

Is SaaS Taxable in Puerto Rico in 2026?

Yes. Puerto Rico charges a sales and use tax, called impuesto sobre ventas y uso (IVU). Unless the sale is exempt, software as a service (SaaS) is subject to this tax.

Sales Tax

Portugal VAT Rates and Compliance (2026)

Learn about Portugal’s 2026 VAT rates, registration rules, invoicing, and compliance tips for businesses selling goods or digital services.

Sales Tax

Hungary VAT Rates and Compliance (2026)

Learn about Hungary’s 2026 VAT rates, registration rules, invoicing, and compliance tips for businesses selling goods or digital services.

Sales Tax

South Dakota Sales Tax Guide: Rates and Rules

Planning to sell products or services in South Dakota? Find out everything you need to know about South Dakota sales tax to stay compliant and avoid penalties.

Sales Tax

Massachusetts Sales Tax Guide: Rates and Compliance for 2026

If you do business in Massachusetts, you may need to collect sales tax. Learn about Massachusetts sales tax rates, late filing penalties, and other key aspects.