All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.
It is permissible to work as an accounting specialist for financial receivables (dues) with individuals or companies whose work is permissible. Working on the registration of the sales tax due, tax returns, and so on, does not prevent permissibility to work as an account specialist because he does not do anything forbidden or anything that assists in what is forbidden.
It is permissible to audit companies whose activities are permissible without participating in the accounts of usurious transactions. It is not necessary to inquire about the details of the company's business; it is sufficient to know that its activity is permissible and that you do not participate in or have to assist in any prohibited transaction. (See Fatwa: 373405).
The work of the accountant is permitted in a wide area, such as in companies, factories, and institutions that work in permissible activities. Even if those entities deal with some usurious transactions, this does not prohibit the work of the accountant as long as he does not engage in such usurious transactions and is not assigned to them by writing or so.
Allah knows best.