You can add the column to the table design using the following steps:
Open the Format as HTML step
Select the Formatting tab, then select Design under Table
Once in the HTML Table Designer screen,ensure the Columns tab is selected and check the Browser window
Ensure the Environment tab is selected
Under the Scope menu select the RecordSource menu
This will show you the columns from your RecordSource
Click and drag the relevant column into the relevant position in your table
You will now be able to see the column in the table designer and format as needed.