--- title: "How to manage SII in the Sales and Purchasing modules?" slug: "1740657204" tags: ["SII"] updated: 2026-07-30T07:49:19Z published: 2026-07-30T07:55:55Z canonical: "help.ila.cegid.com/1740657204" --- > ## Documentation Index > Fetch the complete documentation index at: https://help.ila.cegid.com/llms.txt > Use this file to discover all available pages before exploring further. # How to manage SII in the Sales and Purchasing modules? - [ ] PT - [x] ES - [ ] AO - [ ] CV - [ ] MZ - [ ] ST - [ ] GW - [x] Professional - [x] Executive - [ ] Public Sector - [ ] Omnia - [ ] Evolution --- ## Activate Communication The communication of documents using the SII can be activated or deactivated. To activate the communication of documents using the SII, follow these steps: 1. Access **Administrator | Company | Business Application Foundation | Company Parameters | General**; 2. Select the option **Communicates via SII**; 3. Specify the communication start year; 4. Click **Save**. --- ## Set up Operations The types of operations are now catalogued as to their fiscal classification. This implies the previous configuration of the fiscal type in all operation types, as well as the purchase documents you wish to communicate to the Agencia Estatal Administración Tributaria (AEAT). To configure operations, follow these steps: 1. Access **[...] | General | Resources | Tables | Business Transactions | Operation Types**; 2. On the **Tax System** tab, define the fiscal type (**Purchases** / **Sales**) for all operation types used. --- ## Set up Sales Documents For the sales documents to be correctly communicated to the *Agencia Estatal Administración Tributaria* (AEAT), you must perform a set of configurations: 1. Access **Marketing & Sales | Sales | Resources | Tables | Sales Document**; 2. Select the document you wish to set up; 3. Define the designation according to the type of document you are configuring; 4. If the document allows **reversal**, you must set up a document with a **different fiscal designation** for the document being set up A reversal document must always be of the **correction** type, that is, with the code that starts with **R**. This document will be used by the reversal feature when performed by differences; 5. If you use **replacement documents**, fill in the fields with the **document type** and **series** to be used when creating the replacement document, whose type is also **correction**(code starting with **R**). This setup is applicable in the **reversal scenario by replacement**, and this document must have the **same nature** of the document being changed. --- ## Set up Purchase Documents To configure documents concerning the SII, follow these steps: 1. Access **Purchases | Purchases | Resources | Tables | Purchase Document**; 2. Select the document you wish to configure; 3. Define the **Designation** according to the document type being configured 4. If the document allows for **reversal**, you must configure a document with a **fiscal designation** different from the document being configured. **Note:** A reversal document must always be of the **correction** type, that is, with the code that starts with **R**. This document will be used by the reversal feature when performed by **differences**. 5. If you use **replacement** documents, fill in the fields with the document type and series to be used when creating the replacement document. The type should **correction** (with a code starting with **R**); **Note:** Only applicable in the reversal scenario by replacement. On the purchase documents, you must fill inthe fields **Original Doc. Series** and **Original Doc. Number**, on the **Transaction** tab. --- ## Configure Current Account Payment Documents Due to the direct posting of payments into **Current Accounts**, there is a need to submit these documents via SII as **Received Invoices**. For this to be possible: 1. Fill in the **tax designation** of the current account document type; 2. Configure the current account document for **Suppliers, Other Creditors**; 3. Select **Communicates via SII** as the communication for the **current account document type series** in the **Tax system** tab. Current account documents issued to customers or other debtors are not communicated via SII. --- ## Create Correction Documents by Difference/Replacement It is possible to create **correction documents by differences or by replacement** using the Reversal feature. **Create Correction Document by Differences** To create correction document by differences, follow these steps: 1. Access the original document and select the context option **Reversal.** Alternatively, you can access the feature using the menu in **[Marketing & Sales / Purchases] | [Sales / Purchases] | Reversal**; 2. Select the option **Correction Type** as **Differences** on the target document configuration; 3. The reversal document assumes the type of document, as well as the series configurated on the source document type. In the integration with the SII, the correction document will be communicated as being of the correction type **R#** as being produced by differences **I**. **Create Correction Documents by Replacement** To create correction documents by replacement, follow these steps: 1. Access the original document and select the context option **Reversal.** Alternatively, you can access the feature using the menu in **[Marketing & Sales / Purchases] | [Sales / Purchases] | Reversal**; 2. When configurating the target document, select the option**Correction Type** as **Replacement**. **Note:** In this case, the reversal document assumes the document and series type of the source document. This reversal document is communicated with the same fiscal type of the original document, for example, **F1**. 3. The replacement document is automatically generated and opened on the editor that can be changed. This document is created according to the configuration of the replacement document type, as well as the replacement series configured on the original document. In the integration with the SII, the replacement document will be communicated as being of the correction type **R#** and produced by replacement **S**.