hi surabhi

for income tax officer exam you can practice previous years papers, here is the list of few books for the income tax officer exam preparation which you are looking for:

• SSC CGL :COMBINED GRADUATE LEVEL EXAMINATION FOR TIER- 1& TIER 2

author - sanjay kumar

publisher- 2013

• ssc combined graduate level mains exam with solved & practice sets (tier-II)

author -expert compilations

publisher-arihant 2012

• ssc cgl : sanyukt snatak staria chayan pariksha tier - 1 evum tier -2 hindi

author - unique research

publiser -2013

• ssc combined graduate level exam guide tier 2 and tier 3 

author : rph editorial board

publisher: rameh publishing house 2012

for more querries comment below

best

sonal