The Quaderno blog

  1. 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 to explain how US sales tax works.
  2. Illustrator of Qoodle flying with a leaf

    Digital Sales Tax in Canada (GST, HST, and more)

    Digital sales tax in Canada can vary from province to province. Here’s a breakdown of Canadian GST, HST, and PST for digital sales.
  3. Qoodle working on the computer

    10 Financial Tips for Online Creators

    Discover 10 essential financial tips for online creators, from managing taxes and expenses to automating invoicing and building long-term financial security.
  4. Illustration of a group of gears with the dollar symbol

    Finance Automation: How to optimize your financial workflows

    Finance automation is a game changer for online businesses, SaaS & e-commerce. Here’s how to optimize finance processes to save time and reduce error.

  5. Illustration of Qoodle with small robots notifying about some alerts

    How to remind clients to pay: payment reminder messages

    Payment reminder messages, especially when automated with the right tools, can work wonders for your cash flow, productivity, and profitability.
  6. Illustration of a laptop with an awning

    Building Your 2025 Ecommerce Growth Strategy: The Ultimate Guide

    We serve some of the best ecommerce brands on the market, and we’re sharing the 10 most successful strategies that we’ve handpicked to help your business grow too!
  7. illustration of a computer using a SaaS solution

    10+ Most Useful SaaS Tools for Businesses in 2025

    Explore useful SaaS tools and unlock the advantages for your online business, from communications to HR, marketing to taxes.
  8. Image of Qoodle resting

    How to Outsource Sales Tax Compliance for Startups

    Sales tax compliance outsourcing for business startups is the right move if you want to grow quickly & confidently. Learn how tax automation software can help.
  9. Qoodle shows a diagram of how the Merchant of Record process works.

    Becoming a Merchant of Record marketplace: Why and Why Not

    Discover the pros and cons of becoming a Merchant of Record marketplace, focusing on risks, responsibilities, and alternative strategies.
  10. Image of a list of product tax codes

    What are product tax codes in the US?

    PTCs are the building block of accurate tax calculations and sales tax compliance. Learn how to navigate US tax code categories.
  11. Illustration representing a tax engine

    What is a tax engine?

    Discover how tax engine software simplifies compliance across global tax jurisdictions, ensuring your business's efficiency and growth.
  12. Illustration of difference of an excise tax from a sales tax

    How is an excise tax different from a sales tax?

    Compare excise tax vs. sales tax to learn the how an excise tax is different from sales tax in the US.
  13. Illustration of all the states in United States

    State-by-State Analysis: Sales Tax Compliance for Multistate Businesses

    Different rules for sales tax by state are hard to navigate when your business sells in multiple places! Learn how to stay tax compliant and save time.
  14. Illustration of Qoodle sliding in and arrow growing upward

    How to maximize small business tax deductions for financial growth

    Learn how to maximize tax deductions for a small business or online business in 4 simple steps, including 10 overlooked deductions!
  15. Illustration of Qoodle giving a presentation about Tax tips

    6 Tax Tips for Small Business Owners in 2025

    Discover essential tax tips for small business owners in 2025! Stay compliant, maximize credits, automate processes, and save money with strategic planning and software tools.
  16. Illustration representing an ecommerce

    Marketplace facilitator tax laws around the world

    Following the rise of tax laws for e-commerce platforms, we’ve created a comprehensive list of every country and jurisdiction in the world with marketplace tax laws.
  17. Illustration of Qoodle with a calculator

    Digital Taxes Around The World

    Comprehensive list of tax laws for digital products/services around the world. Learn which countries have VAT, Sales Tax, GST and other digital taxes.

  18. Illustration of Europe with VAT numbers

    What is a VAT number?

    A VAT number identifies your business in Value-added Tax systems, such as EU VAT. Here's how the number works and whether or not you need one.
  19. illustration of a stamp

    What is a tax exemption certificate (and does it expire)?

    Tax exemption certificates are a crucial part of tax compliance. But do tax-exempt certifications expire? Learn about what these certificates are and when you need to renew them.
  20. Illustration of a coin in transfer

    How the Central Electronic System of Payment Information (CESOP) affects online businesses

    The VAT CESOP Directive, or Central Electronic System of Payment Information, helps the EU enforce VAT rules. Here’s how it will affect remote sellers!
  21. Illustration of an invoice

    The Most Common Types of Invoices for Your Business

    Online businesses must keep track of specific digital documents to comply with accounting and tax rules. The most important place to start? Receipts.