<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128">
  <defs>
    <linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
      <stop offset="0%" style="stop-color:#3B82F6;stop-opacity:1" />
      <stop offset="100%" style="stop-color:#8B5CF6;stop-opacity:1" />
    </linearGradient>
  </defs>
  <rect width="128" height="128" rx="24" fill="url(#grad)"/>
  <text x="50%" y="50%" font-family="Arial, sans-serif" font-size="72" font-weight="bold" fill="white" text-anchor="middle" dominant-baseline="central">TA</text>
</svg>
