> For the complete documentation index, see [llms.txt](https://local.docs.ssaudit.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://local.docs.ssaudit.com/english-1/account-payable-module/setup-section.md).

# 2.1 Setup section

### Vendor / Customer Maintenance

**When to use:** To register and manage information for entities (vendors, customers) transacting with the company. This is a core master data used for detailed payable/receivable tracking (Payable account 331, Receivable account 131), invoice issuance management, and automatic data linking during journal entry posting.

> **Example:** Register vendor "ABC Materials Co., Ltd." — Tax code 0312345678, default payable account 331, VAT rate 10%, currency VND.

![](/files/kuyhamfgSJW8mElvfNYP)

To register vendor / customer information, the user proceeds as follows:

* **Basic Information:**
  * Code / Vendor Name: Enter the identification code and full name per business registration certificate.
  * Is Vendor / Is Customer: Check the entity role; both can be selected simultaneously if the entity is both a buyer and a seller.
  * Tax Code / Address / Phone / Email: Enter contact information and tax code for VAT declaration cross-checking.
* **Default Information:**
  * Payment Terms: Select payment terms (00 - Cash, 01 - 30 days...) to automatically calculate due dates.
  * Tax Rate: Select the default VAT rate — the system will suggest this tax code when posting transactions for this entity.
  * Receivable / Payable / Revenue Account: Assign default payable/receivable and revenue accounts for the entity.
  * Currency / Exchange Rate: Select the transaction currency (default VND).
* **Function Buttons:**
  * Export Excel / Import Data: Export data to Excel file or import data from external file.
  * Save / Copy / Add New / Delete / Close: Standard operations.

> **Note:** The Vendor/Customer master data is shared between the Account Payable (AP) and Account Receivable (AR) modules. When both "Is Vendor" and "Is Customer" are checked, the entity will appear in both modules.