JSFiddle - React, Tailwind, and code Playground

HTML

<table class="half">
    <tr>
        <td class="tdocra c_white">Nome :</td>
        <td>
            <input class="inputs" name="ragsoc" type="text" class="text-sx" id="ragsoc" value=""/>
        </td>
        <td class="tdocra c_white b">Mnemo:</td>
        <td>
            <input class="inputs" name="mnemo" type="text" class="text-sx" id="mnemo" value=""/>
        </td>
        <td class="tdocra c_white">Partita IVA :</td>
        <td>
            <input class="inputs" name="piva" type="text" class="text-cx" id="piva" value=""/>
        </td>
    </tr>
</table>

JavaScript

$('.inputs').keydown(function (e) {
     	if (e.which === 13) {
     		//$(this).next('.inputs').focus();
            $(this).closest('td').nextAll().eq(1).find('.inputs').focus()
     	}
     });