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

# Integrations

> Connect QuickBooks, Square, and the rest of your stack.

Integrations keep Terrace and the tools around it in agreement, so nothing gets typed twice and nothing falls out of sync.

## QuickBooks

QuickBooks is the deepest integration. Connect from **Integrations → QuickBooks**, authorize with Intuit, and configure how data flows:

### Customer synchronization

Choose a direction: **Import only** (QuickBooks → Terrace), **Export only** (Terrace → QuickBooks), or **Both directions**. Then run **Import Customers** or **Export Customers** on demand.

### Invoice export

Turn on **Auto-export invoices** and finished invoices flow to QuickBooks on a schedule: **Hourly**, **Daily**, or **Manual only** if you prefer to push them yourself. Payment methods map across, including **ACH**, **Cash**, **Check**, and **Credit card**.

### Reconciliation

Terrace periodically checks both sides and reports **Discrepancies** (an **Amount Mismatch** or **Field Mismatch** between a Terrace invoice and its QuickBooks copy), along with how many **invoices checked** and **issues found**. Sync problems show as **Errors** with enough context to fix them, and each invoice's sync state is always visible on the [Invoices screen](/guides/invoices).

## Square

Square powers card payments, including [Retail Checkout](/guides/orders#retail-checkout) point-of-sale flows, and recorded payments carry Square as their method so your records line up.

## More on the way

The Integrations screen lists what's live and what's coming. If a tool you depend on is missing, tell us: [founders@terracetech.co](mailto:founders@terracetech.co).

<Note>
  Connecting and configuring integrations is limited to Owner and Admin roles.
</Note>