Tax Return Document Checklist
A checklist to stop you discovering a missing document halfway through your filing. Select your situation and everything irrelevant disappears, leaving only what you need. Your ticks are saved automatically in this browser, so you can pick up where you left off. The page also prints cleanly for paper use.
Select everything that applies to you
Turn off "Show all" and pick your situation to keep only the relevant items. Deduction items stay visible for everyone, since they can apply to anyone.
Tags: Arrivesdocuments that come to you Collectthings you prepare yourself Auto-linkedretrievable via My Number Portal
1. Needed by everyone
Required whatever your situation. Without these you cannot start entering anything.
2. Salary and pension documents
Documents that arrive from your employer or the pension service. Put them in one place as they come in and you will not have to hunt for them twice.
3. Business, side-job and rental income and expenses
The part you compile yourself. Its accuracy determines the accuracy of the whole return. Aim to finish by early February.
4. Investment and crypto documents
With a withholding-type specific account alone, no filing is needed — but filing can pay if you want to offset losses or carry them forward.
5. Deduction certificates
This section drives your refund. Employees do not need to repeat what was handled at the year-end adjustment, but anything you forgot then can be recovered here.
6. Filing and payment preparation
The last stretch once the documents are in. Decide the payment method in advance and the final day is far calmer.
No items match the situation you selected. Choose another option or return to "Show all".
What My Number Portal linkage does and does not cover
Linking the National Tax Agency's filing site to My Number Portal fills in certificate data automatically. It does not cover everything, though, and knowing the split in advance makes it much easier to judge how much work is left.
| Document | Linkage | Notes |
|---|---|---|
| Medical expenses (insured treatment) | Retrieved automatically | Private treatment, over-the-counter medicine and travel costs are not included — add them manually |
| Life insurance premium certificate | Retrieved automatically | Only for policies where the insurer supports linkage |
| Furusato Nozei donation receipts | Retrieved automatically | Only donations made through a supported portal |
| Year-end mortgage balance | Retrieved automatically | Supported lenders only. The first year still needs the other documents |
| Annual securities transaction report | Retrieved automatically | Supported brokers only. General accounts are excluded |
| Public pension withholding slip | Retrieved automatically | Corporate and private pensions are separate |
| Salary withholding slip | Depends on the employer | If your employer does not issue electronically, take the paper copy |
| Business revenue and expenses | Not covered | Compiled from your own books |
Set up linkage by the autumn before you file
Linkage requires a My Number Card, a valid electronic certificate, and registration with each institution. Starting once the filing season is underway usually means giving up and typing everything in anyway. Our e-Tax filing guide walks through the steps.
Related pages
- Filing guide for employees / for sole proprietors / corporate tax filing
- Filing with e-Tax (screen-by-screen walkthrough and pitfalls)
- Tax calendar (what arrives when, and what is due when)
- Tax calculators (estimate your refund)
This is a general guide. The documents you need depend on your income and the deductions you claim — check with the National Tax Agency or your local tax office. Your ticks are stored only in your own browser and are never sent to a server.



