http://new.cac.gov.ng/home/registration-steps/
2. For new business owners, your Taxpayers Identification Number (TIN) is generated automatically.
TIN is free
For registered businesses that have not obtained or have forgotten their TIN click HERE: and type in your RC Number/BN Number @ to ascertain your (TIN).Your corresponding business name and the assigned TIN and Tax Office will be displayed. TIN has been generated for all registered companies and enterprises.
3. Register to file and remit Value Added Tax, (VAT) and Withholding Tax (WHT) at the nearest FIRS office. (See the list of FIRS offices HERE
Note that you must file and pay VAT and WHT tax returns not later than 21st of every month.
You can also download VAT and WHT tax forms HERE:
4. File your Companies Income Tax, CIT, returns not later than six months after the end of the Accounting Year or 18 months after the commencement of business or whichever comes first.