> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getmeasure.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Numeral

Numeral calculates taxes on Measure invoices in real-time and handles the full sales tax compliance lifecycle — from nexus monitoring and registration through filing and remittance.

## Key Capabilities

* **Real-time calculation**: Taxes are calculated during invoice generation based on customer address and product tax category
* **Product tax mapping**: Map Measure products to Numeral tax categories to ensure correct tax treatment across jurisdictions
* **Filing & remittance**: Numeral prepares and submits state returns on your behalf with an on-time filing guarantee
* **Nexus monitoring**: Tracks your transaction volume against economic nexus thresholds and alerts when registration is required
* **Automatic registration**: Handles state registrations when you cross a nexus threshold
* **Exemption certificate management**: Manages customer exemption certificates and applies them automatically
* **Global coverage**: Supports US sales tax across all states and VAT in 80+ countries
* **Government correspondence**: Handles state and local tax notices via virtual mailboxes on your behalf

## How It Works

The integration calculates taxes seamlessly during your billing workflow. When an invoice is generated, Measure sends the line items and customer address to Numeral, which returns the applicable tax amounts based on your product mappings and the customer's location. The calculated tax is committed as a recorded sale in Numeral once the invoice is finalized, and reversed automatically when a refund or credit note is issued.

A complete customer billing address is required for tax calculation. Invoices without a valid address will not have tax applied.

## Configuration

Connect Measure to Numeral using your Numeral API key. Once connected, map each Measure product to a Numeral tax category to ensure accurate treatment.

## Product Tax Categories

| Category                  | Numeral Code                  | When to use                                          |
| ------------------------- | ----------------------------- | ---------------------------------------------------- |
| SaaS General              | `SAAS_GENERAL`                | General-purpose SaaS products sold to all customers  |
| SaaS General B2B          | `SAAS_GENERAL_B2B`            | SaaS products sold exclusively to businesses         |
| Software B2B              | `SOFTWARE_B2B`                | Downloadable or licensed software sold to businesses |
| Software B2B License      | `SOFTWARE_B2B_LICENSE`        | Perpetual software licenses sold to businesses       |
| SaaS With Download (Used) | `SAAS_WITH_DOWNLOAD_USED`     | SaaS that includes a downloadable component          |
| Data Processing           | `DATA_PROCESSING`             | Data processing or analytics services                |
| Consulting Services       | `CONSULTING_SERVICES_GENERAL` | Professional or consulting services                  |
| Non-Taxable               | `NON_TAXABLE`                 | Products that are not subject to sales tax           |
| Exempt                    | `EXEMPT`                      | Products sold to tax-exempt customers                |

Every product must have a mapping before invoices can be taxed. Unmapped products will cause tax calculation to be skipped for that line item.