I have a control for the current date. I also have a control for an activation date. I would like the activation date to auto-populate with a date at least three days in the future of the current date. Can I do this on a responsive form?
As far as I know you cannot set default value for a datetime field in a Nintex responsive form.
You have two options:
1- using Nintex workflow, and then Calculate Date Action.
2- SharePoint Calculated column and using this formula: =Created+3
What would like to achieve? In Nintex form there is dateAddDays() and fn-DateDiffDays() for date calculation (runtime function/inline function). or you can add days in sharePoint calculated column.