How Does Personal Income Tax Filing Work in Imo State, Nigeria?

Yes — every state in Nigeria can have its own tax filing process, even though your TIN remains the same nationwide.
Here’s the clarity:
1. TIN vs State Tax ID (Like ASIN)
TIN (Tax Identification Number) — issued by Federal Inland Revenue Service (FIRS)
Used across Nigeria
One person = One TIN (for life)
However…
Many states also create their own internal taxpayer ID for administrative purposes.
Examples:
Anambra State Internal Revenue Service uses ASIN (Anambra State Identification Number)
Lagos State Internal Revenue Service uses LASRIN
Imo State Internal Revenue Service may generate state taxpayer ID when you register
So yes — states may have their own systems, but TIN is still the master number.
2. If You Live in Imo State — Where Should You File?
For Personal Income Tax, you file in: 👉 State where you live and work
So since you’re living in Imo: You should file with
Imo State Internal Revenue Service
Even if:
Your business is elsewhere
Your company HQ is elsewhere
Your residential state is what matters.
3. How To File in Imo State (Step-by-Step)
Step 1 — Confirm Your TIN
You already have this (good 👍)
Step 2 — Register with Imo State IRS
You may be asked for:
TIN
Phone number
Address in Imo
Occupation
Email
They may generate Imo taxpayer ID for you.
Step 3 — File Your Annual Return
Deadline: 📅 Usually March 31 every year (for individuals)
You submit:
Income details
Business income (if any)
Salary income (if any)
4. Important (Since You Often Ask About Salary + Business)
Because you previously mentioned:
Salary income
Business income
You must declare both when filing in Imo State.
Even if:
PAYE already deducted from salary
You still must file annual return.
(This is very important — many people miss this.)
Quick Summary
TIN = National (used everywhere)
ASIN = State-specific (Anambra example)
Imo may issue its own ID
File tax where you live (Imo)