As you want I am here telling you about the salary offered to the candidate who get job on Tax Assistant post in CBDT through SSC CGL exam.

Tax Assistant in CBDT salary and allowances
(i) Pay Scale 5200-20,200
(ii) Grade Pay 2400
(iii) Initial Pay 5200
(iv) Total Pay (i) + (ii ) 7600

Major allowances:
DA on Total Pay above (around 107 %)
Transport Allowance
House Rent Allowance(if not provided with quarters)
Petrol allowance

A MTNL/BSNL sim from the department on which :
all STD calls on every type of BSNL/MTNL phone are free;
and 400 minutes on other phones whether STD or LOCAL are free for every month.
And also 1 GB 3G data free use of data on internet.

Salary : around 23,000/- pm initially( can be varied a little as per place of posting)

Tax Assistant career path:
Sr Tax Assistant
Income Tax Inspector (ITI)
ITO (Group-B gazetted)
Assistant commissioner.

Tax Assistant in CBDT Stages of Examination:
Two Tier Written Objective Exam
Document Verification