UBER parking is available at Howrah. This is especially helpful because when this was not present, the Uber cabs used to park at private car parking where you had to pay additional 60 for parking charges. However because of this, you need only pay the fare. There is also a kiosk here where you can book a cab for yourself if you are unable to do it yourself. The UBER parking is located in between the new and the old terminus. If you exit from the old terminus, cross the road and keep heading right and you shall see it. If you exit from the new terminus, cross the road and keep heading left.
EDIT:...
more... Also, when you book a cab at Howrah, they will pick up from UBER parking and so it will be an easy and hassle free pickup