If you just want to check all the boxes when a card is completed, you could use something like Butler to automate it (https://butlerfortrello.com https://butler

If you just want to check all the boxes when a card is completed, you could use something like Butler to automate it (https://butlerfortrello.com https://butlerfortrello.com). It won't help with showing the checkboxes on the cards though. For example, I use this to ensure checkboxes are checked before a card can be moved into another column. Or to mark the due date as complete when all checkboxes are checked.