Sec 44ad of the IT act

Sec 44AE is most appropriate in your case if you do not own more than 10 cabs. 

then you can go for the presumptive income .

Yes you can use the benefit of section 44AD.

If you are only receiving commission from that plying of taxi cab then 44AD wont be applicable. 

@ Naveen Chand: 

44AE is only applicable in case of goods carriage.