JSFiddle - React, Tailwind, and code Playground

HTML

<div></div>

SCSS

div {
  &::before {
    position: absolute;
    top: -15px;
    right: 40px;
    
    width: 22px;
    height: 22px;
    
    content: '';
    transform: skewY(42deg) scale(1.06);
    
    border-top: 0.165em dashed black;
    border-left: 0.165em dashed black;
    background-color: white;
  }
  
  position: relative;

  width: 250px;
  height: 380px;
  margin: 35px 10px 10px 10px;

  border: 2px dashed black;
  border-radius: 5px;
  background-color: white;
}