Magento – How to get order totals

Other than the single totals (subtotal, tax, shipping, discount) which you can reorder in Stores > Configuration > Sales > Sales > Checkout Totals Sort Order, the grand totals are hard coded in the template

Magento/Tax/view/frontend/web/template/checkout/cart/totals/grand-total.html

<tr class="grand totals incl">
    <th class="mark" scope="row">
        <strong data-bind="i18n: inclTaxLabel"></strong>
    </th>
    <td data-bind="attr: {'data-th': inclTaxLabel}" class="amount">
        <strong><span class="price" data-bind="text: getValue()"></span></strong>
    </td>
</tr>
<tr class="grand totals excl">
    <th class="mark" scope="row">
        <strong data-bind="i18n: exclTaxLabel"></strong>
    </th>Magento/Tax/view/frontend/web/template/checkout/summary/grand-total.html
    <td data-bind="attr: {'data-th': exclTaxLabel}" class="amount">
        <strong><span class="price" data-bind="text: getGrandTotalExclTax()"></span></strong>
    </td>
</tr>

Override this template in your theme and change the order of these two <tr> table rows.

This template is for the cart. For the checkout summary, do the same in Magento/Tax/view/frontend/web/template/checkout/summary/grand-total.html

I found the solution here https://stackoverflow.com/questions/18362033/change-the-order-of-totals Hope it helps someone. These things fixed it for me:

1) Change order of totals in admin side system->configuration->sales->checkout totals sort order

2) copy /app/code/core/Mage/Sales/etc/config.xml lo local and edit and tags of children

3) Copy app/code/core/Mage/Sales/Block/Order/Totals.php to app/code/local/Mage/Sales/Block/Order/Totals.php

and edit getTotals function to be like this

public function getTotals($area=null)
{
        //Move tax below subtotal
        if($tax = $this->getTotal('tax'))
        {
        $this->removeTotal('tax');
        $this->addTotal($tax, 'subtotal');
        }       

        $totals = array();
        if ($area === null) {
        $totals = $this->_totals;
        } else {
        $area = (string)$area;
        foreach ($this->_totals as $total) {
            $totalArea = (string) $total->getArea();
            if ($totalArea == $area) {
                $totals[] = $total;
            }
        }
    }       
    return $totals;
}