Tax Assistant job is group C post comes under Central Board of Direct Taxes ( CBDT ). This job is vacancy is filled through SSC CGL exam every year.

A tax assistant can be promoted to the senior tax assistant post in 3 years.
After this promotion he can become Deputy office superintendent or inspector in next 3 years after passing departmental exams.

Future in next 10-12 years a tax assistant can become a Income Tax Office & Assistant commissioner which is A grade officer job . This A grade post is directly filled by UPSC CSE exam.

A Tax Assistant is usually promoted to Senior Tax Assistant 3 years after he enters the job and may become an Excise Inspector/PO in the next 3-4 years, which means he can reach up to 4600 GP in just 6-7 years. STA usually takes 8-9 years to become an examiner i.e. in total after 12 years of entry.

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