ul {
    list-style: none;
}

ul li:before{
    content: "2022";
    font-size: 170%;
    margin-left: -16px;
}

<ul>
    <li>
        <textarea name="txtBullet1" rows="2" cols="70" id="txtBullet1" tabindex="20" onkeyup="maxLen(this);" required="required" style="width:100%;"></textarea>
    </li>
</ul>