Hi Em,

Here you go!

Any of these can help.

<strong>Invoice Date: <span t-field="o.date_invoice" /></strong>

or:

<strong> Invoice Date: </strong> <span t-field="o.date_invoice" />

or

<table>
    <tr> 
        <td> 
            <strong>Invoice Date: </strong> <span t-field='o.date_invoice'/>
        </td>
    </tr>
</table>

Note : You have used <p> tag that's why its moving to next line.

Rgds,

Anil.