title: What can I do to correctly display the tax owed at the end?
body: <p>I have been at this for hours now. For some reason, the tax owed isn't coming up. The code appears to be correct, but for some reason, the most important result isn't coming up. What do I have to fix for it to show up? Also, is the rest of it good? Thank you for your assistance. 
  The code is attached below:</p>
  
  <p><div class="snippet" data-lang="js" data-hide="false" data-console="true" data-babel="false">
  <div class="snippet-code">
  <pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;html&gt;
  &lt;head&gt;
  
    &lt;meta charset="UTF-8"&gt;
    &lt;title&gt; Tax Program &lt;/title&gt;
  &lt;/head&gt;
  
  &lt;body&gt;
    Age Range:
    &lt;input type="radio" name="range" id="Youngerthan21" onclick='under21 = "Y"'&gt; Younger than 21
    &lt;input type="radio" name="range" id="Olderthan21" onclick='over21 = "N"'&gt; Older than 21
  
    &lt;script&gt;
      var taxrate = 0;
      var income = parseInt(incomeID.value);
  
      if (Youngerthan21.checked == false &amp;&amp; Olderthan21.checked == false) {
        alert("Enter age range");
        return;
  
      }
  
      if (isNaN(income)) {
        alert("Enter valid income");
        return;
  
      }
  
      function taxFinder() {
  
        if (under21 == "Y") {
          if (income &lt;= 20000) {
            taxrate = .08;
  
          } else if (income &gt; 20000 &amp;&amp; income &lt;= 50000) {
            taxrate = .12;
  
          } else {
            taxrate = .20;
          }
        } else(over21 == "N") {
          if (income &lt;= 20000) {
            taxrate = .10;
          } else if (income &gt; 20000 &amp;&amp; income &lt;= 35000) {
            taxrate = .15;
          } else if (income &gt; 35000 &amp;&amp; income &lt;= 70000) {
            taxrate = .25;
          } else {
            taxrate = .30;
          }
  
        }
  
        TaxOwedid.value = income * taxrate;
  
      }
  
      function clearButton() {
        incomeid.value = "";
        TaxOwedid.value = "";
        Youngerthan21.checked = false;
        Olderthan21.checked = false;
  
      }
    &lt;/script&gt;
  
    &lt;p&gt;
      Income:
      &lt;input type="text" id="incomeID"&gt;
    &lt;/p&gt;
  
  
    &lt;p&gt;
      &lt;button id="taxOwed" onclick='taxFinder()'&gt;Process&lt;/button&gt;
    &lt;/p&gt;
    &lt;p&gt;
      Tax Owed:
      &lt;input type="text" id="TaxOwedid" onchange=''&gt;
    &lt;/p&gt;
    &lt;p&gt;
      &lt;button id="clearthis" onclick="clearButton ()"&gt;Clear&lt;/button&gt;
    &lt;/p&gt;
  &lt;/body&gt;
  &lt;/html&gt;</code></pre>
  </div>
  </div>
  </p>