<form class="form" action="#some-action">
  <ul class="nav nav-tabs " role="tablist" id="tabs">
    <li role="presentation" class="active">
      <a class="Profil" href=".Profil" aria-controls="Profil" role="tab" data-toggle="tab">Profil</a>
    </li>
    <li role="presentation" class="">
       <a class="Kontak" aria-controls="Kontak" role="tab" data-toggle="tab">Kontak</a>
    </li>
    <li role="presentation" class="">
      <a class="Paspor" aria-controls="Paspor" role="tab" data-toggle="tab">Paspor</a>
    </li>
  </ul>

  <div class="tab-content">
    <!--  Form Profil   -->
    <div role="tabpanel" class="tab-pane active Profil" href=".Profil">
      <!--    your profil forms    -->
      <input name="nama" class="required"> <!-- 'required' class added just to notice that this is a required input -->
      <input name="phone" class="required">
      <input name="others"/>
      <button type="button" class="btn btn-default btn-secondary" id="btn-Profil">Check</button>
    </div>

    <!--   Form Kontak   -->
    <div role="tabpanel" class="tab-pane active Kontak" href=".Profil">
      <!--    your kontak forms    -->
      <input name="email" class="required"/>
      <input name="second_email" class="required"/>
      <select name="location">
        <option value="">choose...</option>
        <option value="location 1">location 1</option>
        <option value="location 2">location 2</option>
        <option value="location 3">location 3</option>
      </select>
      <button type="button" class="btn btn-default btn-secondary" id="btn-Kontak">Check</button>
    </div>

    <!--   Form Paspor   -->
    <div role="tabpanel" class="tab-pane active Paspor" href=".Profil">
      <!--    your paspor forms    -->
      <!--    since paspor form is the last one, change button type to 'submit'    -->
      <input name="paspor_number">
      <!--
       the last form won't be validated in this case, so any required input should be done in previous form.
       this happened since the button type here is 'submit'
       -->
      <button type="submit" class="btn btn-default btn-secondary" id="btn-Paspor">Submit</button>
    </div>
  </div>

</form>