Go to https://trello.com and log in to your account.

Select the card you would like to add a checklist to.

Click the "Checklist" button located in the right sidebar.

Enter the name of the checklist in the "Add a Checklist" field.

trello.com

If you are looking to keep track of tasks and organize your workflow, Trello is a great tool to use. Adding a checklist to a card in Trello can help you break down a task into smaller, more manageable steps. This can help you stay organized and ensure that all tasks are completed in a timely manner. Additionally, having a checklist on a card can help you keep track of your progress and make sure that nothing is forgotten.

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