# Configure and Test FBR Digital Invoicing

### How to Configure and Test FBR Digital Invoicing in Muhasib ERP

### Overview

This guide will help you configure the FBR Digital Invoicing connector and validate representative invoices in an authorized sandbox.

Muhasib serializes invoice/header and item data into the connector model and stores or displays the returned result according to system behavior.

### Who can do this

You need access to Tax integration settings plus invoice/sale and relevant master-data permissions.

### Before you start

Get current FBR sandbox specification, credentials/token, seller/buyer rules, scenario IDs, item/service codes, units, tax mappings, and approved samples.

<div id="bkmrk-%F0%9F%9A%A8-importantmake-sure" style="border-left: 4px solid #dc2626; background: #fef2f2; padding: 12px 16px; margin: 15px 0; border-radius: 4px;">Before saving, check that the correct company is open and that you have permission to complete this task.</div>### Where to find it

Back Office → tax/global settings and the needed invoice workflow.

### Configure and Test FBR Digital Invoicing

#### Step 1: Configure only the approved sandbox endpoint and protected credentials

#### Step 2: Map seller, buyer, document, scenario, item, unit, value, rate, and

Map seller, buyer, document, scenario, item, unit, value, rate, and tax fields.

#### Step 3: Test registered and unregistered buyer cases as applicable

Test registered and unregistered buyer cases as needed.

#### Step 4: Submit one representative invoice once

#### Step 5: Preserve sanitized request and full response identifiers/status

#### Step 6: Reconcile response line results to local lines

#### Step 7: Test approved rejection and recovery scenarios before go-live

### Check your work

Every sandbox scenario receives the expected status and each response line/value maps unambiguously to the local invoice.

<div id="bkmrk-%F0%9F%92%A1-tipcheck-the-saved" style="border-left: 4px solid #2563eb; background: #eff6ff; padding: 12px 16px; margin: 15px 0; border-radius: 4px;">Take a moment to check your work before closing the window. This small check can save time later.</div>### If something goes wrong

- Treat schema-valid and authority-accepted as different states.
- Do not infer current field requirements solely from bundled models.

### Related guides

- [Prepare Muhasib for Tax Integration](https://docs.muhasiberp.com/link/275)
- [Submit and Verify a Tax-Integrated Sale](https://docs.muhasiberp.com/link/280)
- [Recover from Tax Submission Failure](https://docs.muhasiberp.com/link/282)

### What to do next

<div id="bkmrk-%E2%9C%85-next-actioncontinu" style="border-left: 4px solid #16a34a; background: #f0fdf4; padding: 12px 16px; margin: 15px 0; border-radius: 4px;">[**Prepare Muhasib for Tax Integration**](https://docs.muhasiberp.com/link/275).</div>