floating form box on the Carousel (how to do

Question

Friends, I need help. I’m taking a test for dev. And I need to put the form box fixed on top of Carousel but I’ve already researched everything and I couldn’t. I wonder if you could help me?

I already made the box and put. but it stays down and I do not know how to make it float on the Carousel

  <h3?php
    if (isset($_SESSION ['msg'])){
        echo $_SESSION['msg'];
        unset($_SESSION['msg']);
    }
    ?>
    <div class="float-right">                       
        
        <body1 class="text-center">
            <main class="form-signin">   

                <img class="mb-4" src="img/Logo Teste Dark.svg" alt="" width="132" height="57">
                <h1 class="h3 mb-3 fw-normal">Cadastro</h1><br>

                <form method="POST" action="processa.php">
            
                <div class="form-floating mb-3">
                    <input type="text" name="nome" class="form-control"id="floatingInput" placeholder="Nome completo">
                </div>
                
                <div class="form-floating mb-3">            
                    <input type="email" name="email" class="form-control" id="floatingInput" placeholder="[email protected]">
                </div>
            
                <div class="form-floating mb-3">
                    <input type="text" name="telefone" class="form-control" id="floatingInput" placeholder="xx-xxxxxxxxx">
                </div>
                <div class="checkbox mb-3">
                    <label>
                    <input type="checkbox" value="remember-me"> Mantenha conectado
                    </label>
                </div>
                
                <input class="w-100 btn btn-lg btn-primary" type="submit" value="ENVIAR">         
            
            
                </form>
            </main>  
        </body1>  
    </div>
    <!--Fim Formulario-->