@sebastianslz
Very good...
Ideally, it would be more efficient if your checkboxes were in a Gallery rather than individual checkboxes. This would make your formulas so much clearer.
But, as it is, set your Update property to:
Filter(
Table({opt: Checkbox2.Value; Value: "Example value 2"};
{opt: Checkbox8.Value; Value: "Example value 3"};
{opt: Checkbox9.Value; Value: "Example value 4"};
{opt: Checkbox10.Value; Value: "Example value 5"};
{opt: Checkbox11.Value; Value: "Example value 6"};
{opt: Checkbox12.Value; Value: "Example value 7"};
{opt: Checkbox13.Value; Value: "Example value 8"};
{opt: Checkbox14.Value; Value: "Example value 9"}
);
opt
)
You can get rid of the OnCheck and OnUncheck action formulas...you don't need to use a collection or behavioral action formulas.
Your Default properties on the Checkboxes should be cleaned up from what it is, but if it is working at this point, then leave it be. Otherwise, let me know what the Item property of your form is.