Projects, sections & subtasks

Todoist organizes tasks into projects, sections, and subtasks. 2sync maps each level of this hierarchy to Notion, and you choose the mapping style for each: a simple Select property for quick setups, or a relational database when you need rollups, dashboards, and project-level metadata. This page explains every option so you can pick the right approach for your workflow.

How is Todoist organized?

Todoist structure:

• Project: the top-level container (e.g. "Marketing", "Personal")
• Section: an optional grouping inside a project (e.g. "To Do", "In Progress")
• Task: an individual to-do item inside a project or section
• Subtask: a task nested under another task, at any depth

In Notion, 2sync represents each level with a property on your tasks database:

• Projects → Select property or Relation to a Projects database
• Sections → Select property or Relation to a Sections database
• Subtasks → Separate pages linked through a Parent Task relation

How do I map projects?

Basic: select property

Map Project to a Select property:

• Project names appear as select options
• Easy filtering with Notion's built-in select filters
• No additional database needed

Advanced: relational database

Map Project (Relation) to link tasks to a Projects database:

1. Create a Projects database in Notion with at least a Title property
2. Connect it to 2sync: (•••) > Add connections > 2sync
3. In your task automation, map Project (Relation) to a Relation property pointing to your Projects database

Benefits of relational mapping:

• Add project-level metadata (deadlines, owners, status)
• Use rollups to count tasks per project
• Create project dashboards with linked views

How do I map sections?

Basic: select property

Map Section to a Select property for simple section identification:

• Section names appear as select options
• Filter tasks by section using Notion's select filters
• Good enough when you only need to see which section a task belongs to

Advanced: relational database

Map Section (Relation) to link tasks to a Sections database:

1. Create a Sections database in Notion with at least a Title property
2. Connect it to 2sync: (•••) > Add connections > 2sync
3. In your task automation, map Section (Relation) to a Relation property pointing to your Sections database

How do subtasks sync?

Todoist subtasks sync as separate Notion pages, linked to their parent task through a Relation property.

Setting up subtask relations

1. Map Parent Task (Relation) to a Relation property
2. Set it to relate back to the same tasks database
3. Subtasks will link to their parent pages automatically

Subtask depth is unlimited in Todoist, and 2sync syncs every level. Each subtask links to its direct parent through the Parent Task relation. In Notion, you see one level of nesting at a time, but you can follow the chain of relations to navigate the full hierarchy.

Viewing subtasks

In Notion, create views to manage subtasks:

Parent tasks only: Filter where Parent Task is empty

Subtasks only: Filter where Parent Task is not empty

Hierarchical view: Group by Parent Task property

Subtask behavior

• Completing a parent in Todoist completes its subtasks
• This syncs to Notion, and all related pages update
• Editing subtasks in Notion syncs changes back

Projects vs sections: when to use which

How do I prevent unassigned tasks from syncing?

If you only want tasks with projects to sync:

1. Go to Filters in your automation
2. Add condition: Project is not empty
3. Tasks in Todoist's Inbox (no project) won't sync

Alternative: filter by specific projects

Sync only certain projects:

1. Add filter: Project is [Project Name]
2. Add multiple conditions with "Any" logic for multiple projects

How does the Todoist inbox work?

Include Inbox: Don't filter by project. All tasks sync including Inbox

Exclude Inbox: Filter where Project is not empty, or Project is not "Inbox"

Inbox as a project: If using relations, Inbox tasks link to an "Inbox" entry in your Projects database

Common issues

Tasks not assigned to correct project

This typically happens when:

• The Project (Relation) database isn't connected to 2sync
• The project name doesn't exist in your Projects database
• There's a conflict between Calendar Name relations and Project relations

Fix:

1. Open your Projects database in Notion
2. Click (•••) > Add connections > 2sync if not already connected
3. Re-sync or wait for the next sync cycle
4. See relations for detailed setup instructions

Events reassigned to default

If using calendar sync alongside task sync with relational mappings, check that Calendar Name and Project relations don't conflict.

Fix:

1. Open your automation's field mapping
2. Check whether both Calendar Name (Relation) and Project (Relation) point to the same property
3. Unmap one of them if they conflict
4. See advanced sync settings for more on field mapping

Missing sections

Sections must exist in Todoist first. 2sync syncs existing sections but doesn't create new organizational structures from Notion.

Fix:

1. Create the section in Todoist
2. Move at least one task into the section
3. Wait for the next sync cycle. The section will appear in Notion

Subtasks appearing as top-level tasks

If subtasks show up without any parent link in Notion, the Parent Task relation is not mapped.

Fix:

1. Open your automation's field mapping
2. Find Parent Task (Relation) in the Todoist fields list
3. Map it to a Relation property that points back to the same tasks database
4. Re-sync. Existing subtasks will link to their parents

What should I do next?

1. Todoist fields for every field you can map between Todoist and Notion
2. Todoist filters for controlling which tasks sync with conditions
3. Relations for a detailed guide on setting up relational databases with 2sync
4. Todoist sync for the full Todoist integration overview

Related

• Todoist sync for the full Todoist integration guide
• Todoist fields for the complete field mapping reference
• Todoist filter conditions for filtering tasks by project, label, and more
• Relations for setting up relational databases with 2sync
• Notion property types for understanding how Notion properties map
• Default values for configuring defaults on new items
• Two-way vs one-way sync for choosing your sync direction
• Advanced sync settings for fine-tuning your automation
• How to sync Notion with Todoist for a step-by-step tutorial

FAQ