Hi @LRrokaj7,
It’s not possible to filter for properties being filled through a form submission – just the fact that field is filled and that a form submission has happened in the past day, for example. But it’s not possible to specify that the value has been provided through the form submissions.
For enrollment in a workflow, you would choose the “When filter criteria is met” enrollment option, then find your checkbox property under “Contact properties” and specify that it’s value should be yes.
Additionally, below “Contact properties” find “Form submissions”, find your form and specify that your form, refine the filter and specify that the submission has happened less than 1 day ago.
There could be edge cases where the checkbox was filled other means and the contact has submitted the form without checking the box. It’s unlikely, but it could happen.
Let me know if you have any follow-up questions!