What is the ruling on working in the tax sector and the National Social Security Fund, and what is the basis for their prohibition?

The ruling on working in taxation depends on its type; some are permissible, and some are forbidden. As for working in the social security fund, its ruling depends on the basis of the fund's operation; if it relies on interest-based borrowing or stipulates a late fee, then it is not permissible to work in it because it falls under cooperating in sin. However, if it does not rely on a prohibited activity but deposits its funds in usurious banks, then there is no harm in working in it for tasks not related to usurious accounts.