The right floated button is something that is useful to show on top of a table on the right side.
Just add the class
right floated and you are good to go.
<button class='basic green ui right floated button' id='rerun_all_checks'> Rerun all checks </button>
Incase you want to align with something specific, include the button in the tag that you want to align with.
<h3> Income invoices <a class='ui basic green button right floated' href="/gstin/<%=req.gstin.value%>/invoice/create?type=income">Create income invoice</a> </h3>