Create Login with account and username

Trying to setup a login to work with Amazon's new Console login in page. It has an Account, UserName, Password, and then it has a checkbox to enter a MFA code (which I have to lookup on my phone)...and then when that checkbox is check, it displays another text box for the MFA Code.

When I go to this page and click my 1Password login, I want it to fill in the account, username, password, and to check the MFA checkbox...and do not submit. Then I can lookup in my phone the code, fill it in, and hit submit. I can't seem to get this to work.

Here is a snippet of the html on the login page with the relevant elements.

    <fieldset>
        <div class="textinput" id="input_account">
            <label for="account">Account:</label>
            <input id="account" name="account" autocapitalize="off" autocorrect="off" value="">
        </div>
        <div class="textinput" id="input_username">
            <label for="username">User Name:</label>
            <input id="username" name="username" autocapitalize="off" autocorrect="off" value="">
        </div>
        <div class="textinput" id="input_password">
            <label for="password">Password:</label>
            <input id="password" name="password" type="password" autocapitalize="off" autocorrect="off">
        </div>
        <br>
      </fieldset>


      <fieldset>
        <div class="checkboxinput" id="input_mfa_checkbox">
            <input type="checkbox" name="mfa_checkbox" id="mfa_checkbox"> 
            <label for="mfa_checkbox">I have an MFA Token <a href="http://docs.aws.amazon.com/console/iam/mfa" class="more">(more info)</a></label>
        </div>
        <div class="textinput" id="input_mfacode" style="display: none;">
            <label for="mfacode" id="mfa_login_label">MFA Code:</label>
            <label for="mfacode" id="mfa_resync_label" style="display: none;">MFA Code #1:</label>
            <input id="mfacode" name="mfacode" autocapitalize="off" autocorrect="off" autocomplete="off">
        </div>
      </fieldset>

      <fieldset>
        <div class="textinput" id="input_next_mfacode" style="display: none;">
            <label for="next_mfacode">MFA Code #2:</label>
            <input id="next_mfacode" name="next_mfacode" autocapitalize="off" autocorrect="off" autocomplete="off">
        </div>
      </fieldset>


      <br>
      <div class="buttoninput" id="input_signin_button">
          <a id="signin_button" class="css3button" href="https://signin.aws.amazon.com/....." alt="Continue" value="Continue">Sign In</a>
      </div>