The Quaderno blog

  1. GAAP word illustrated with charts

    What are Generally Accepted Accounting Principles (GAAP)

    Generally accepted GAAP principles (GAAP) apply to all companies in the US. Learn all the GAAP rules for your business accounting.

  2. Illustration of Qoodle verifying some VAT numbers

    How to check if a company is VAT registered

    Learn how to check if a company is VAT registered in countries around the world by using VAT lookup tools or tax compliance automation software.

  3. Illustration of Quaderno Pro Tip #1: Automate your expenses

    Quaderno Pro Tip #1: Automate your expenses

    Expense reporting can be tricky, but Quaderno simplifies it for you with automatic recurring purchases, beautiful balance sheets, and easy-to-read reports.

  4. Illustration of Qoodle with a hat and keeping a calculator

    US Sales Tax Guide: Everything You Need to Know

    Whether you have a business in the US or you’re a remote seller with US customers, we’re here with a detailed Guide on US sales tax.

  5. Illustration of an ecommerce on a mobile screen

    An Introduction to Online Marketplace VAT Rules

    Online marketplace VAT comprehensive guide. Unlock the fundamentals of how VAT applies to eCommerce and the tax compliance criteria for a seamless process.

  6. Illustration of Qoodle cutting a price tag

    What is reverse charge and how does it work?

    Reverse charge is a mechanism that requires buyers to report & remit taxes, instead of sellers. Understand how it works and how your business can comply.

  7. Box in parachute

    Guide to Dropshipping Sales Tax

    Dropshipping sales tax and VAT is a tricky part of e-commerce. Learn about the tax obligations for online businesses and dropshippers selling B2B and B2C.

  8. How to calculate sales tax as a remote seller

    Remote seller sales tax guide 2026: Nexus and calculation

    Just because you are a remote seller doesn't mean you are off the hook when it comes to taxes. Learn how to calculate US sales tax as a remote seller!

  9. An illustration of a pile of papers

    What is accrual accounting and how is it beneficial for SaaS?

    Accrual accounting is a necessary business practice for SaaS and subscription models, along with MRR and revenue recognition. Learn why it’s so important.

  10. Illustration of Fulfillment by Amazon, accounting by Quaderno

    Fulfillment by Amazon, accounting by Quaderno

    Quaderno helps you fill in the accounting-shaped holes in what Fulfillment by Amazon can do for you. This article will show you how to improve and automate your FBA accounting.

  11. Illustration of a box and tax-related items

    Everything you need to know about GST

    A complete Goods and Services Tax (GST) guide for businesses: learn GST rules, who must register, and how to stay compliant while growing your online business.

  12. Illustration of Qoodle using a computer surrounded by 12 starts

    EU VAT for remote sellers

    Selling into the EU from abroad? Discover VAT rules for remote sellers, including thresholds, OSS schemes, and how to register hassle-free.

  13. Illustration of E-commerce EU VAT changes in 2021

    E-commerce EU VAT changes in 2021

    EU VAT ecommerce rules will change for B2C, imported goods, and marketplaces. Make sure you’re prepared to comply with it!

  14. Illustration of confused Qoodle

    Do I need to collect sales tax for selling online in 2026?

    Not sure if you need to charge sales tax online? Learn when and where you must collect sales tax, VAT, or GST, plus tips to stay compliant while growing sales.

  15. Illustration representing an ecommerce

    What is distance selling? How it works in the EU

    Understand EU distance selling rules and thresholds to avoid tax penalties. Learn how to stay compliant when selling online across borders.

  16. Illustration of a hand tapping out a ramification on tax digitization

    Digitalization of Taxes: How to Improve Business Efficiency and Compliance

    Discover how tax digitalization improves business efficiency, reduces errors, and ensures compliance. Learn actionable steps to modernize your tax processes.

  17. Illustration of Australia's map showcasing GST percentage

    Digital Taxes Down Under: Australia’s GST

    Find out if you’re responsible for GST in Australia! Digital products require digital taxes, but it depends on a sales threshold and where you sell online.

  18. Illustration of Qoodle with a calculator

    Digital taxes around the world

    Selling online globally? Learn the latest VAT, GST, sales tax & digital tax rules to stay compliant and grow your business worldwide.

  19. Illustrator of Qoodle flying with a leaf

    Digital Sales Tax in Canada: What Online Sellers Need to Know

    Confused about Canada’s digital sales tax rules? Learn what applies to online businesses and how to stay compliant with GST/HST/PST for digital sales.

  20. Illustration representing a cloud service with digital product icons.

    What are digital products?

    Explore the world of digital products with our comprehensive guide. Learn key definitions, selling tips, and tax compliance strategies to boost your online business.

  21. Step by step Sales Tax guide

    Sales Tax, VAT & GST Compliance Guide for Digital Consultants in 2026

    Master sales tax (state-by-state), VAT (EU), and GST (global) compliance for consulting services. Learn tools to automate tax collection and filings.