Step-by-step help for Kintsugi sales tax software — connect integrations, track nexus, register, and file returns. Search guides, FAQs, and troubleshooting.

Kintsugi Help Center | Sales Tax Software Support & Guides

Your First Steps to Stress-Free Tax Filing

Getting Started

State Registration & Tax Filing to Ensure Business Compliance

Registrations & Filings

Your guide to integrating third-party services with step-by-step instructions 

Integrations

Manage your Kintsugi subscription, billing details, payment methods, invoices, and learn about pricing plans, refunds, and account changes.

Subscription & Billing

Frequently Asked Questions

Explore our collection of helpful guides, contact information, and tools to assist you with tax-related questions and processes.

Resources

Troubleshooting

Collection of Kintsugi's product & marketing contents

Blogs

Learn how Kintsugi supports customers in EU

Kintsugi Supports European Union (EU) Member States

Learn how EU VAT is determined by place of supply. See B2B versus B2C treatment, reverse charge, destination rules for digital goods, and the threshold.

How EU VAT Is Determined

EU VAT registrations explained. Learn what triggers VAT liability, the 10,000 euro cross-border threshold, OSS and IOSS schemes, and filing rules.

EU VAT Registrations Explained

Understand OSS versus IOSS for EU VAT. Learn which One-Stop Shop scheme you need based on where your goods are located, plus the 150 euro rule and 2026 updates.

Understanding OSS vs. IOSS: Which One Do You Need?

Learn how Kintsugi simplifies EU VAT compliance, explaining VAT versus sales tax, the One-Stop-Shop scheme, and the factors that determine your VAT obligations.

Kintsugi Simplifies EU VAT Compliance

Understand the EU One-Stop Shop with Kintsugi: how Union and Non-Union OSS work, who qualifies, and how to register and file a single EU VAT return.

Simplify EU VAT: Kintsugi and the One-Stop Shop (OSS)

Review and approve EU One Stop Shop filings in Kintsugi: open the Filings section, choose Europe and UK, filter your returns, and approve amounts shown in EUR.

How to Review and Manually Approve Your EU OSS Filings in Kintsugi

Import your EU VAT registrations in Kintsugi: use the Registrations tab to add a jurisdiction or OSS registration, authorize Power of Attorney, and track it.

How to Import an Existing EU OSS Registration into Kintsugi

What Non-Union OSS covers, what it leaves out, and how Kintsugi handles each part

How Non-Union OSS works in Kintsugi

Which EU country you register through, when the choice is yours, and how long it binds you