TaxProMax Filing Guide: How to File Your Taxes Online (2026)

What is TaxProMax?

TaxProMax is the Federal Inland Revenue Service (FIRS) online portal for tax filing in Nigeria[^1]. Under the Nigeria Tax Act 2025, this is where you'll submit your annual tax returns starting January 2026.

Portal URL: taxpromax.firs.gov.ng

Before You Start: What You Need

Before logging into TaxProMax, make sure you have:

1. Your TIN (Tax Identification Number)

If you don't have one, register at the JTB TIN Portal: tinverification.jtb.gov.ng[^2]

You'll need your NIN or BVN to register

This is required to create your TaxProMax account

2. Your Income Records

Total income for the tax year

Already converted to Naira (use CBN rates at time of receipt)

Broken down by source if you have multiple income streams

3. Your Deduction Records

Business expenses with receipts

Already categorized and totaled

Rent payment records (for Rent Relief claim)

4. Bank Details

For payment reference

Step 1: Create Your Account

If this is your first time:

Go to taxpromax.firs.gov.ng

Click "New User Registration"

Enter your TIN

Fill in your personal details

Create a password

Verify your email

Common Issue: If your TIN doesn't work, your BVN/NIN data may not match. Visit your local FIRS office with your ID to resolve.

Step 2: Log In and Navigate

From the dashboard, click "File Returns"

Select "Annual Returns"

Choose the tax year (2025 for filing in 2026)

Step 3: Fill in Your Income

You'll see sections for different income types:

Employment Income

If you have a regular employer who withholds taxes, enter those details here. Most freelancers skip this section.

Self-Employment Income

This is where most freelancers report:

Enter your total gross income in Naira

Select "Self-Employed" as income type

Add your business description

Other Income

For additional income sources like:

Investment returns

Rental income

One-off payments

Step 4: Claim Your Deductions and Reliefs

Under NTA 2025, the relief structure has changed[^3]:

Rent Relief (New)

Enter your annual rent paid

System calculates 20% of rent (max ₦500,000)

You'll need landlord details and evidence of payment

Business Deductions

Click "Add Deductions" to claim:

Business expenses (internet, software, equipment)

Professional development costs

Home office expenses

Other Reliefs Still Available

Life insurance premiums

Pension contributions (8% of qualifying income)

NHIS contributions

National Housing Fund contributions[^4]

Note: The old Consolidated Relief Allowance (CRA) no longer exists under NTA 2025.

Step 5: Review Your Calculation

TaxProMax will show:

Your total income

Your total reliefs/deductions

Your chargeable income

Your tax liability (using the new 0%-25% brackets)

Compare this with TaxJeje's calculation. If there's a significant difference, double-check your entries.

Step 6: Submit and Pay

Review all information

Click "Submit Return"

You'll get a reference number — save this

If you owe tax, you'll see payment options

Payment Options

Bank transfer (to designated FIRS account)

Card payment (online)

USSD

Common Errors and Fixes

"TIN Not Found"

Your TIN may not be in the system. Visit FIRS with your ID.

"Session Timeout"

The portal times out quickly. Save your work frequently.

"Server Error"

The portal can be slow during peak times (late March). Try early morning or late night.

Numbers Don't Match

If your calculated tax doesn't match what you expected, check:

Did you enter income in Naira (not USD)?

Did you claim the Rent Relief?

Did you select the correct tax year?

Are you using the old tax brackets by mistake?

Pro Tips

File Early — Don't wait until March 31. The portal gets slow.

Screenshot Everything — Keep records of your submission.

Download Your Receipt — Save the confirmation for your records.

Use TaxJeje First — Calculate your tax in TaxJeje using NTA 2025 rules, then transfer the numbers to TaxProMax. This catches errors before submission.

Filing Deadlines

Income YearFiling Deadline

2025March 31, 2026
2026March 31, 2027

Late filing attracts penalties: ₦100,000 first month + ₦50,000 for each subsequent month[^5].

After Filing

Keep your filing receipt

Save your TaxProMax confirmation number

Set a reminder for next year's deadline

Keep supporting documents for at least 6 years

Need Help?

If you're stuck, TaxJeje's tax report gives you all the numbers you need formatted for TaxProMax. Just log your income and expenses throughout the year, and we'll generate a filing-ready summary using NTA 2025 calculations.

Get Your Filing Summary →

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References

^1]: [FIRS TaxProMax Portal
^2]: [JTB TIN Verification Portal
^3]: [KPMG - Changes to Personal Income Tax Relief
[^4]: Section 30, Nigeria Tax Act 2025 - Allowable Deductions and Reliefs
^5]: [NTAA 2025 Penalties - Excellium