DualEntry Sales Tax Automation
Kintsugi calculates what you owe in every state from your DualEntry invoices, tracks nexus as you grow, and files and remits your returns.
Free exposure monitoring · Filing from $75 · No per-transaction fees
Rated 4.6/5 on G2 (55 reviews) · 7,000+ customers
Kintsugi
Trusted by 7,000+ businesses
Kintsugi calculates, monitors, and files your DualEntry sales tax
- Calculate
What you owe, everywhere
Kintsugi classifies your DualEntry items and calculates what you owe in every jurisdiction, straight from your invoices and credit memos.
A real-time tax engine for DualEntry is on our roadmap.
- MonitorFree
Nexus in every state
Get alerted the moment your DualEntry sales cross a state's economic nexus threshold, before it becomes back tax.
- File & remit
Returns filed for you
Kintsugi registers you where you owe, files every return, and remits on schedule, from $75 per filing or registration.
CalculateNeed tax calculated at checkout or invoice time? Kintsugi's Tax Estimation API and SDKs do it. Tax Estimation API docs
How DualEntry connects to Kintsugi
DualEntry stays your system of record. Kintsugi reads that same data to calculate what you owe, track where you owe it, and file every return, without your team learning a new system.
Connect & sync
Create a DualEntry API key with Admin access and paste it into Kintsugi. Customers, products, sales invoices, and sales credit memos sync automatically.
Calculate what you owe
Kintsugi classifies every DualEntry item for taxability and calculates what you owe in every US state, plus VAT and GST in 100+ countries.
Register, file, and remit
Kintsugi registers you where you owe, files and remits every return on schedule, and keeps the reports your finance team needs to stay audit-ready.
What Kintsugi syncs from DualEntry
| Synced | What Kintsugi does with it |
|---|---|
| Customers | Matched to the location each sale is taxed in. |
| Products | Classified for taxability so exposure and liability are built on the right foundation. |
| Sales invoices | Tracked against every state's economic nexus threshold and used to prepare your returns. |
| Sales credit memos | Applied at the transaction level so filings reflect what you actually collected. |
Who uses Kintsugi with DualEntry
Selling into new states
Get told the moment your DualEntry sales cross a state's economic nexus threshold, before it becomes back tax.
Switching from Avalara
Run Kintsugi alongside Avalara on your DualEntry sales first, then switch whenever you're ready. No upfront cutover.
Handing off filing
Kintsugi registers, files, and remits in every jurisdiction where you owe, with confirmations in one dashboard.
How DualEntry sales tax works
What DualEntry does
DualEntry calculates US sales tax on invoices, sales orders, cash sales, and customer credits through Avalara AvaTax. It needs your own AvaTax account, your companies set up in both systems, and product tax codes assigned to each item.
Where it stops
DualEntry's guide leaves the rest with you: tax nexuses are configured in AvaTax for every jurisdiction where you collect tax, tax is calculated when a transaction is posted rather than on drafts, and a customer needs a complete shipping address to be taxed.
What Kintsugi adds
Kintsugi reads your DualEntry invoices and credit memos, calculates what you owe in every jurisdiction, monitors nexus for you, and registers, files, and remits your returns.
Why Customers Love Us
Jared Stark
Founder of Incendico Fire Alarm Store
The setup was incredibly seamless and much faster than I expected, with clear guidance throughout the process. What really stands out is their support since it is easy to get in touch with someone quickly and the team is knowledgeable and actually helpful when you have questions.
April Walford
Operations Manager at JMXi
They corrected errors in our past returns, enrolled us quickly and efficiently, filed everything on time, and thoroughly researched any questions or concerns we had. Their customer service is excellent.
Mo Hartman
Staff Accountant at Searchspring
Having the visibility on the dashboard has been extremely helpful and the ease of being able to approve. It is very user-friendly and I can see everything I need in one place.