JSFiddle - React, Tailwind, and code Playground

HTML

<table>	
    <tr><input type="button" value="clear" onclick="toggleBankCount();" />
    </tr>
    <tr>
		<td>Closing Agent Bank Street Address:</td>
        <td><input type="text" value="1" name="loanXclosingStreet" id="2ndBankFields" /></td>
	</tr> 
	<tr>
		<td>Closing Agent Bank City:</td>
        <td><input type="text" value="2" name="loanXclosingCity" id="2ndBankFields" /></td>
	</tr>
</table>

JavaScript

toggleBankCount = function () {
    secBankFields = document.getElementsByTagName('input');
    for (var i = 0; i < secBankFields.length; ++i) {
        if(secBankFields[i].id === '2ndBankFields')
            secBankFields[i].value = '';
    }
}