# Adding a subtask

Source: [https://docs.virtosoftware.com/docs/kanban-board-on-premises/working-with-a-kanban-board/subtasks/adding-a-subtask/](https://docs.virtosoftware.com/docs/kanban-board-on-premises/working-with-a-kanban-board/subtasks/adding-a-subtask/)
Product: Kanban Board On-Premises
Updated: 2026-08-12


Virto Kanban Board on-premises supports subtasks. Use subtasks to split your Kanban tasks and manage them step by step.

Click “**Add subtask**” on the card of the task you want to make a parent task.

![Add subtask option on a Virto Kanban card to make the task a parent task](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/adding_a_subtask_1.png)

*Add subtask*


When the parent task view appears, decide whether you’re going to make a subtask from an existing task or create a new one. **Both options are available.**

*If you’re adding an existing task as a subtask, enter its ID. To view a card ID on kanban cards, choose "****ID****" in Cards fields (Cards settings tab).*

![Selecting the ID field in the Cards settings tab so the task ID appears on Virto Kanban cards](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/adding_a_subtask_2-1024x324.png)

*Select ID value to appear on a kanban card.*


![A Virto Kanban card showing its task ID for use when adding an existing task as a subtask](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/adding_a_subtask_3.png)

*ID of the task*


![Adding an existing task with ID 8 as a subtask by entering its ID in the parent task view](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/adding_a_subtask_4-1024x375.png)

*Adding an existing task as a subtask with ID: 8*


By default, subtasks will appear in the **"Subtasks"** tab of the parent task. Click the subtask to view its detailed information.

![An added subtask listed in the Subtasks tab of a Virto Kanban parent task](https://img-docs.virtosoftware.com/wp-content/uploads/2024/11/adding_a_subtask_5-1024x543.png)

*Added subtaks (from an existing task)*


Only parent tasks have the **"Subtasks"** tab, except when the multilevel option is enabled for subtasks.

*"****Allow multi level****" setting is located in Advanced setup, "*[***Additional***](https://docs.virtosoftware.com/docs/kanban-board-on-premises/kanban-board-settings/advanced-setup/additional/index.md)*" section; it enables subtasks beyond the second level, namely subtasks for subtasks.*

If you are adjusting a custom board (not a quick board created automatically), ensure that tasks and subtasks are taken from a single task list; otherwise, the subtasks will not function properly.

If you are using a board with multiple lists, the subtask option will be unavailable.