Toilet will not swirl and go down

You may not like this appraoch but you ned to reach down to the lowest sump area of the toilet and check the 1" hole for debris. This hole allows water to enter the sump area and it creates/starts the siphon action that makes the flush. Also, check the small holes under the rim of the toilet, usually a coat hanger works for this. However, before you start can your tell us how high the water level is compared to the top of your overflow tube, we want to be sure your tank is filling properly.

On top of Bob's advice, the following is Tom's advice.

Look down at the bottom of the bowl. If there is a small hole, then that is a jet that starts the siphon action. If it's clogged the water will just swirl around and slowly go down leaving solids behind. Take your finger, (UGH! ) and run it around the inside of the opening. Over the years minerals build up and cut down on the siphon (flush) action. If it is rough or you feel build up, take a table knife and put a bend in it to get around the curve in the bowl and chip and scrap it clear. Next take a coat hanger and clear out the holes around the rim. They start the swirling action. And last, check the water level in the tank. It should be 1/2" below the top of the over flow tube. And speaking of the overflow tube, Make sure the small 1/8" tube from the ballcock to the white overflow tube is connected so it discharges in it and that it's flowing when the ballcock fills. This is what raises the water level in the bowl. For a
Good solid flush they all have to work together. Hope this helps.

John