What are the differences between FIRS and state IRS tax filing processes in Nigeria for annual returns?

Absolutely, let’s break this down clearly. Filing annual tax returns in Nigeria is a bit different depending on which state you live in, because personal income tax is state-based under the PAYE system (with some coordination with FIRS for federal-level taxes). Here’s a detailed view:

1. Lagos State Residents

Lagos State has a fully functional online portal: LIRS Portal

Process for annual return:

Register and get your Tax Identification Number (TIN) if you don’t have one.

Login to the portal → go to Tax Returns → select File New Return.

Input salary info, allowances, PAYE already deducted.

Submit and print tax clearance certificate, if needed.

Note: LIRS makes it easy because everything is digital and you can file even without visiting their office.

2. Federal Capital Territory (Abuja) Residents

FCT‑IRS has a similar online portal: FCT Tax Portal

Steps are almost the same as Lagos:

Register for a TIN (mandatory).

Login → File annual personal income tax return.

Fill in salary, allowances, and PAYE deductions.

Submit and keep record.

3. Residents of states without functional online portals

Some Nigerian states don’t yet have fully functional IRS websites, so the process is largely manual:

How to file in such states:

Visit your State Internal Revenue Service (SIRS) office physically.

Bring:

Valid identification

Salary slips / PAYE deduction statements from your employer

Any other income proof (if applicable)

Request the Personal Income Tax Return form for the assessment year.

Fill in the details:

Salary and allowances

PAYE already deducted

Other income (if any)

Submit the form at the office.

Pay any additional tax owed (if your PAYE was insufficient).

Request a tax clearance certificate if needed.

Tip: Even in states without websites, most large employers maintain records of PAYE remitted, so it’s often easier to get the information from HR/Payroll.

4. Key points to remember

TIN is mandatory for all residents, regardless of state.

Filing deadlines are usually before March 31 of the year following the assessment year.

Even if PAYE was deducted, filing may still be required for:

Multiple sources of income

Claiming allowances or reliefs

Obtaining a tax clearance certificate

If a state doesn’t have a portal, physical filing at the SIRS office is the only option.

✅ Bottom line:

States like Lagos or FCT → online filing is available.

States without online portals → manual submission at the state revenue office.

Knowledge is indeed power: staying proactive with TIN, PAYE records, and annual returns keeps you tax compliant and ready for any official requirement.