Condition to deselect a checkbox if another is selected in card format?

I'm aware that you're not able to set conditions within a checkbox question but on the long format you can add a single checkbox response and then set a condition to disable the previous question if selected.

My questions is are you able to do this in card format? Basically, can you show more than one questions on one card?

We do have a multi-line question field in the card form in which you can add multiple field elements.

Please check it out and let us know if this fits you requirements.

I actually need checkboxes. So technically the dropdown would work but then I need the second field to be something like: none of the above

Unfortunately, there's no checkboxes available in the Multi-Line Question field. You can use another Dropdown field and add a "none of the above" option.

Will that work for you?