I've rendered a categorylist as a checboxlist. Now I would like to go to an action in a controller, when clicking a checkbox element. How can I do this

public class BlogPageController : PageController<>BlogPage>
    {
        public ActionResult Index(BlogPage currentPage)
        {
            
            var category = Category.Find("Post");
            var postcategories = category.Categories; /* subcategories of category Post
 
            currentPage.Categories = postcategories;

            var model = PageViewModel.Create(currentPage);
 
            return View(model);
        }
 
        [HttpPost]
        public ActionResult Index()
        {
            /*Here is the point I would like to go after clicking a checkbox*/
 
            return null;
        }
    }

Rendering categories in displaytemplate/CategoryCollection.cshtml

@using (Html.BeginForm("Index", "BlogPage", FormMethod.Post))
{
 
    <>div class="row">
 
        @if ((string)@ViewData["class"] == "SelectCategories")
        {
 
            foreach (var category in Model)
            {
                @*@category.Description
                    *@
 
                @*@category.Description*@
                <>label class="@ViewData["itemclass"]">@Html.CheckBox(@category.ID.ToString(), false) @category.Descriptionlabel>
            }
        }
    div>
    <>button type="submit">Submitbutton>
}

The rendering is Ok, but I can't go the action breakpoint when clicking any checkbox (return null above)