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

Customize Organization/Billing/Bank Details and other Settings

Configuration Tab Guide

Connect your marketplace to Kintsugi to monitor nexus. Use direct integrations, manual CSV uploads, or a custom API connection to consolidate your sales data.

Connect Your Marketplace to Kintsugi

Learn how to set up sales tax payment in Kintsugi for filings and registrations. Add encrypted bank details for ACH; Kintsugi never pays without your approval.

Setting Up Sales Tax Payment for Filings and Registration

Learn how to set up organization details in Kintsugi, including business details, information, contact person, and company owners for accurate registration.

How to Set Up Your Organization Details in Kintsugi

Customize your Kintsugi account and automation settings, including auto-approve registrations, file only what you collected, sandbox testing, and default items.

Customizing Your Kintsugi Account & Automation Settings

Learn how to create a test organization in Kintsugi from the Configuration Settings tab, giving you a sandbox to try features and generate a test-only API key.

Creating a Test Organization

Understand your Kintsugi billing and subscription. See your plan overview, pricing, payment method, and billing history, and learn how to upgrade or switch.

How to View and Change Your Kintsugi Subscription Plan

Learn how to update your billing details in the Kintsugi app, including billing and shipping contacts, the billing email address, and your payment method.

How to Update Billing Details in the Kintsugi App

Learn how to enable File Only What You've Collected in Kintsugi to match filings to collected tax, why calculated liability can differ, and the risks.

How to Enable File Only What You’ve Collected (and When to Use It)

Learn how to set a default product classification in Kintsugi so new synced products are categorized automatically for accurate, consistent tax calculations.

How to Set a Default Product Classification

Learn how the Using Business Address for Missing Addresses setting keeps tax calculations running when ship-to data is fully blank, and the rules that apply.

Using Your Business Address for Missing Addresses

Learn how admins manage critical email notifications for users in the Kintsugi app, including how the toggle works and what happens when notifications are off.

Managing Email Notifications for Users in the Kintsugi App

Control how often you get non-critical Kintsugi emails. Learn to set daily, weekly, monthly, or off frequency per user and how bundled digest emails are sent.

Customizing Email Notification Frequency in the Kintsugi App

Choose whether Kintsugi keeps a product's exempt status from your source or runs its own AI classification instead. See how the setting works and our advice.

Choosing How Kintsugi Handles Exempt Products from Your Integrations

Learn how to add a user to your Kintsugi account: open Configuration, go to Users, click Invite, enter an email, assign a role, and save the change.

How to Add and Manage Users in Kintsugi

Choose whether product changes in a connected source may update matching products in Kintsugi. See how to toggle Allow Product Updates From Source on or off.