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Overview

Zamp will assist with every part of the installation on your Business Central account. You can follow along with the steps here, but you will always have a Zamp Integrations Implementation expert on a live call handling the installation.

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Prerequisites

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Installation Process

1

Installing the Zamp Extension

  1. In the Business Central search bar, look for** Microsoft AppSource Apps.**
  2. Search for Zamp, and click Acumens Zamp API for D365 BC.
  3. Click Install and accept the permissions access request.
The installation may take about 5-minutes. 
2

Changing to the Acumens User Role

  1. Click the  icon at the top-right of Business Central.
  2. Under Role, update the role to Acumens e-Tax. 
3

Entering your API Key

  1. Search for Zamp APIs and allow the configuration to load (~15-seconds).
  2. Click ZAMP01.
  3. Under API TOKEN, enter your Sandbox or Production API Key.
4

Syncing Nexus States and Testing the Connection

  1. Search for Nexus States.
  2. Click Home.
  3. Click Sync Zamp Registrations.
  4. Once the sync is complete, you will see the following.
I Synch Is Complete 1
5

Configuring Transaction Posting Behavior

The integration allows for the flexibility to post transactions in real-time, or on a cadence. It also allows for every invoice to be uploaded as an individual transaction, or invoices for the same customer to be batched together.
  1. Search for Acumens e-Tax Enterprise Setup.
  2. Scroll down to Uploads (Auto-File).
  3. Toggle between Upload Individual Documents or Upload Summarized Documents.
    1. Upload Individual Documents: Every invoice is a transaction in Zamp. Not batched.
    2. Upload Summarized Documents: Invoices for the same customer will be aggregated to be a single transaction in Zamp each time an upload is attempted.
  4. Under Background Uploads, enable Upload on Post to post transactions when invoices are posted (i.e. Real-time).

Tax Codes and Exemptions

Once the above steps are completed, Zamp is enabled to calculate and post transactions! To ensure all taxability scenarios are handled, see the** Microsoft Business Central support **guides to review mapping product tax codes, customer exemptions, and managing multi-channel sales.
Last modified on August 20, 2026