If you want to add an additional column, you will go to the ellipse in the top right of the board screen and then click on board settings. Click on Columns. This is where you add columns. You will have to have an "In Progress" type of status in your work flow to drop into the column for this to work.
It looks like you are trying to configure a Business Project board. Is that correct?
If so, see if this helps guide you:
If it is not a business project, what type of project is it?
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