what's better? Finance or Idt dept?

There will be lot of factors here while considering a job offer. But if the job is Finance and accounts it gives you knowledge in all subjects. but if you take only indirect taxation, you will be having indepth knowledge in the same subject and after some experience you can become a consultant for indirect taxation. Think again since once you select your job in future also the jobs will be based on that profile only.

Finance role will provide knowledge in various subjects but again it depends on the job profile which we selected. Please decide whether you wanted to continue as an employee or start your own firm. On that basis, please choose the job option.