Hanif Sylhet to Tangail bus booking counter.
In case of wait it can be a good place.There are not so many people in here to disturb you, you can take rest easily.
Most buses for Dhaka are leaves from here. Ena, Hanif, Shamoli etc buses are available.
Close to other bus booking office as well for more options. 4 stars because we could not find ticket last time.
If you want to go anywhere near to srimangal you will get buses there.