car delivery drive - mielage expense- help pls

HI i drop cars off for my job and would like to claim mileage expense. Can someone please explain to me which mileage can i claim for. I travel to a different places to pick up a car using my car. e.g 20 miles. i drive car to clients house with the car they have requested. e.g. 20 miles i then get someone to drive me back or get a train to my car. 20 miles Then i drive home in my car e.g 20 miles What is the total mileage can i claim here in this situation. Can i claim all of it. 20 to car , 20 to client, 20 back to my car, and then 20 home. Or which parts can i claim for. I am not sure what to do here.

Hi,

Please refer to:

Claim tax relief for your job expenses

Thank you.