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 with a detailed Guide on US sales tax.

  2. illustration of a stamp

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

    Discover what a tax exemption certificate is, who qualifies, and how businesses can issue and manage them for tax compliance.

  3. Illustration of Qoodle carrying the European flag with the text VAT

    How to get a VAT number in Europe

    Do you need a VAT ID number in Europe? Learn how to register, when it’s required, and how to stay compliant while selling across the EU.

  4. Illustration of Qoodle generating income and taxes

    Digital Tax Rules for Online Courses

    Selling courses online? Learn global tax rules for digital products, including VAT, GST, & sales tax, and how to stay compliant with ease.

  5. Image of Qoodle behind an invoice

    What is a tax invoice?

    What is a tax invoice and why is it required? Learn the key elements, when to issue one, and how to simplify invoicing for VAT, GST & sales tax compliance.

  6. Illustration of Qoodle sliding in and arrow growing upward

    How to maximize small business tax deductions for financial growth

    Cut costs with smart tax deductions! Learn which expenses small businesses can deduct and how to maximize savings legally and easily.

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    How to Outsource Sales Tax Compliance for Startups

    Tired of tax headaches? Discover how outsourcing sales tax compliance saves time, reduces errors, and keeps your business audit-ready.

  8. Image of a list of product tax codes

    What are product tax codes in the US?

    What are product tax codes (PTCs) and why do they matter? Learn how tax codes affect rates, compliance, and smooth checkout for your business.

  9. Illustration of an invoice

    The Most Common Types of Invoices for Your Business

    Confused about invoices? Discover the most common types of invoices, when to use each, and how they simplify payments and tax compliance.

  10. Qoodle shows a diagram of how the Merchant of Record process works.

    Becoming a Merchant of Record marketplace: Why and Why Not

    Learn what a Merchant of Record is and the pros & cons for online marketplaces. Learn about risks, responsibilities, and alternative strategies.

  11. Illustration of a group of gears with the dollar symbol

    Finance Automation: How to optimize your financial workflows

    Automate financial processes to save time, cut costs, and reduce errors. Streamline reporting and compliance for online businesses, SaaS, and ecommerce.

  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.

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    Building Your 2025 Ecommerce Growth Strategy: The Ultimate Guide

    Unlock proven ecommerce growth strategies to attract more customers, boost sales, and scale globally without getting lost in tax complexity.

  14. Hands holding a tablet showing a e-invoice

    What is e-invoicing?

    Learn what e-invoicing is, why it’s mandatory in many countries, and how to implement it. Streamline compliance and get paid faster today.

  15. 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.

  16. Image of Qoodle resting while some bots runs the benefits

    What is Automated Accounting? Benefits and Best Practices

    Discover how automated accounting saves time, reduces errors, and keeps finances accurate. Choose tools to streamline your financial management today.

  17. Illustration of qoodle automating the invoice generation

    How to Automate Your Invoices

    Learn how to automate invoices to cut manual work, prevent errors, and get paid faster. Discover simple tools to streamline billing and boost efficiency today.

  18. 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.

  19. 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.

  20. Illustration representing an ecommerce

    Marketplace tax laws around the world in 2025

    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.

  21. 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.