Illustrative previewA build-to-order Business Central (AL) extension that automates multi-jurisdiction sales tax,
US nexus monitoring, marketplace-facilitator handling, exemption certificates and returns-filing prep — built, installed per-tenant and supported by
ECOSIRE on your environment.
What is Avalara-style Marketplace Sales Tax Automation for Business Central?
A build-to-order Business Central (AL) extension that automates multi-jurisdiction sales tax, US nexus monitoring, marketplace-facilitator handling, exemption certificates and returns-filing prep — built, installed per-tenant and supported by ECOSIRE on your environment. Built to order by ECOSIRE for Dynamics 365 BC (build-to-order) — indicative price from $999.00 USD; request a quote for a scoped proposal.
Key Features
Built to order, done for you
No DIY setup — a working app, built, installed and supported by ECOSIRE.
- 1
You order
Start with a one-time build price. We scope it with you at kickoff.
- 2
We build & install
ECOSIRE builds, configures and installs it on your Dynamics 365 Business Central.
- 3
Go live + support
You go live in about one working week, with two weeks of go-live support. Defects in the code we deliver are fixed free of charge.
About this Product
If your business sells across multiple US states or countries through Amazon, Walmart, eBay, Shopify and other marketplaces, sales tax in stock Business Central quickly becomes unmanageable. Native BC posting groups and VAT/tax setup were never designed for economic-nexus thresholds, marketplace-facilitator "collected-by-marketplace" rules, or per-jurisdiction rate sourcing at order line level.
This is a build-to-order Business Central extension. ECOSIRE designs, builds, installs and supports it on your Business Central environment — there is no instant Microsoft AppSource download. We deliver it as a per-tenant extension (or, where you prefer, package it for your private AppSource pipeline), so the AL code, table/page extensions and permission sets live cleanly inside your tenant.
What it does. The extension adds real-time tax calculation to sales orders and posted documents via AL event subscribers on the sales document lifecycle, calling a tax-rate engine (your chosen provider's REST API, or our internal rate tables) and writing results back to dedicated tax-detail tables. A marketplace-facilitator layer flags orders where the marketplace already collected and remitted tax, so you report — but don't double-collect — correctly. A nexus monitor tracks economic-nexus thresholds per US state and raises alerts (via a job queue entry) as you approach registration triggers. Exemption certificates are stored against customers with expiry tracking, and a returns-prep module aggregates collected vs. facilitator-collected tax by jurisdiction for filing.
Everything integrates with the BC REST/OData API for external reconciliation, and can surface KPIs into Dataverse / Power BI. You get the source, the documentation, and a named ECOSIRE engineer for the build and rollout. Honest delivery: this is custom software, scoped to your jurisdictions and marketplaces, with a clear lead time below.
What you get
- Signed, installed per-tenant Business Central extension (.app) deployed to your sandbox first, then production
- Full AL source code (table/page extensions, codeunits, event subscribers, permission sets) handed over to you
- Configuration of your specific US states, nexus thresholds, countries and marketplace channels
- Tax-rate provider integration wired to your chosen REST API, or ECOSIRE internal rate tables seeded
- Exemption certificate setup with expiry tracking enabled on your customer records
- Returns-prep worksheet/report configured for your filing periods and jurisdictions
- Job queue entries configured for nexus recalculation, certificate sweeps and aggregation
- Admin and finance-user documentation plus a recorded handover/training session
Who this is for
Multi-State Marketplace Finance Lead
Owns sales tax compliance for a seller shipping across many US states via Amazon and Walmart. Needs accurate nexus tracking and facilitator handling so the company collects and remits correctly without over-collecting where marketplaces already remit.
Cross-Border eCommerce Controller
Manages a brand selling into the US, UK and EU. Wants BC to handle US sales tax and country VAT side by side without breaking native VAT posting groups, and needs clean returns-prep data for each jurisdiction.
Business Central Admin / IT Manager
Responsible for the BC tenant and extension governance. Wants a per-tenant AL extension with proper permission sets, no core-object hacks, full source handover, and a supportable deployment path through sandbox to production.
How Avalara-style Marketplace Sales Tax Automation for Business Central Compares
| Criterion | ECOSIRE | Custom Build | Competitor | Dynamics 365 Business Central Native |
|---|---|---|---|---|
| Real-time multi-jurisdiction tax calculation on order lines | Included | Partial support | Included | Partial support |
| Marketplace-facilitator (collected-by-marketplace) handling | Included | Partial support | Partial support | Not included |
| US economic-nexus threshold monitoring and alerts | Included | Partial support | Included | Not included |
| Exemption certificate management with expiry tracking | Included | Partial support | Included | Not included |
| Returns-filing prep aggregated by jurisdiction | Included | Partial support | Partial support | Not included |
| Scoped to your exact states, countries and marketplace channels | Included | Included | Not included | Not included |
| Full AL source handover with no vendor lock-in | Included | Included | Not included | Partial support |
| Per-tenant extension, no core-object modifications | Included | Partial support | Included | Partial support |
| Installed and supported on your environment by the builder | Included | Partial support | Not included | Not included |
Frequently Asked Questions about Avalara-style Marketplace Sales Tax Automation for Business Central
Is this an instant AppSource download?
No. This is a build-to-order extension. ECOSIRE scopes it to your jurisdictions, marketplaces and tax-rate source, then builds it in AL and installs it as a per-tenant extension on your Business Central environment (sandbox first, then production). You receive the full source. We can package it for your own private AppSource pipeline if you prefer, but there is no public one-click install.
What is the delivery lead time?
Typical delivery is one working week from scope sign-off, depending on the number of states/countries, whether you connect a third-party tax-rate API or use our internal rate tables, and your marketplace channel count. We start in your sandbox, validate calculations against sample orders with you, then deploy to production. We give you a firm timeline in writing after the scoping call — no surprises.
How do ongoing support and updates work?
The price includes a post-go-live support window with a named ECOSIRE engineer for bug fixes and configuration adjustments. Because tax rules, nexus thresholds and rates change, we offer an optional ongoing maintenance arrangement to keep rate tables, threshold values and facilitator rules current and to update the extension as Business Central evolves. You hold the source, so you are never locked in.
Will it break my existing VAT and tax setup in Business Central?
No. The extension uses table and page extensions plus event subscribers — it adds to native tax/VAT setup rather than overwriting it. Your existing VAT posting groups and posting setup keep working. New tax logic sits alongside them and is governed by dedicated permission sets, so you can roll it out to finance users gradually.
Can it feed Power BI or Dataverse for reporting?
Yes. We expose tax-detail and returns data through the Business Central REST/OData API, which Power BI and the wider Power Platform can consume. We can configure a Dataverse/Power BI reporting path during the build so your tax and nexus KPIs are available outside BC for dashboards and reconciliation.
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Avalara-style Marketplace Sales Tax Automation for Business Central
A build-to-order Business Central (AL) extension that automates multi-jurisdiction sales tax, US nexus monitoring, marketplace-facilitator handling, exemption certificates and returns-filing prep — built, installed per-tenant and supported by ECOSIRE on your environment.
- Real-time sales tax calculation on sales order and posted invoice lines via AL event subscribers on the sales document lifecycle (OnAfterValidate / OnBeforePost)
- Marketplace-facilitator handling that flags 'collected-by-marketplace' orders so tax is reported but not double-collected, driven by a marketplace channel field on the order
- Multi-state US economic-nexus monitoring with configurable per-state revenue and transaction thresholds, with proximity alerts written to the BC job queue
- Multi-country tax/VAT support that extends BC tax setup tables rather than overwriting native VAT posting groups