hi
you need to create one action profile for your transaction type quotation.
then you need to create one action under your action profile. each action has processing types like method call, smart forms mail, fax...etc.
you need to choose your own smart form and one class method to process your smart form function module.
then you need to choose schedule and starting conditions.
its basically configuration work and you can find nice docs once you search. once configuration is done. you can schedule or trigger it in the quotation screen ->actions assignment block. something looks like above.