[Summary]
e-Tax is a convenient system that allows you to file your tax return from home. There are cases where the process can be completed with just a smartphone, but many people stop short of preparation.
The important thing when filing a tax return using your smartphone is the preparation before entering the tax return. It will be easier to proceed if you have your My Number card, PIN, compatible smartphone, withholding tax slip, deduction certificate, medical expense information, etc. ready in advance.
In this article, we will organize the points that beginners should check first in the order in which they are most likely to stumble in practice. Since taxes vary depending on individual circumstances, please confirm the final decision with an official or specialized contact such as the National Tax Agency, local government, tax office, or tax accountant.
First, the conclusion
The important thing when filing a tax return using your smartphone is the preparation before entering the tax return. It will be easier to proceed if you have your My Number card, PIN, compatible smartphone, withholding tax slip, deduction certificate, medical expense information, etc. ready in advance.
| Check points | way of seeing |
|---|---|
| Things that are likely to be needed | My number card, PIN, smartphone, income/deduction information. |
| Easy to stumble on | Forgotten PIN, poor reading, missing documents, and failure to enter account information. |
| declaration to face | Salary income, medical expense deduction, hometown tax, simple side job, etc. |
| confirmation | After sending, check the reception result, payment method, and refund account. |
The important thing when reading tax articles is not just memorizing the system name. It's about looking at your income, accounts, deductions, and reporting methods separately.
common misconceptions
- Start just before the deadline and stop due to lack of PIN or materials.
- People mistakenly think that just by sending it, they have paid their taxes.
- I do not have deduction certificates or donation data on hand.
This is an area where it is easy to get confused just by reading the search article. In particular, "sales" and "income," "income tax" and "resident tax," and "NISA" and "taxable account" need to be treated as different things.
Order of actual checking
If you are confused, it will be easier to organize if you check them in the following order.
- Have you checked your My Number Card PIN?
- Have you prepared your withholding tax slip and deduction certificate?
- Have you confirmed your refund account and payment method?
- Did you save the reception result after sending?
If it is still difficult to make a decision after looking at the above, it is safer not to leave it to your own judgment. Please check through official channels such as consultation with the tax office, the National Tax Agency's tax return preparation corner, and consultation with a tax accountant.
Summary
e-Tax is convenient, but if you are not prepared, it will stop midway. A shortcut is to gather your credit card, PIN, income information, and deduction information before filing your tax return.
While it's hard to get away with not knowing about taxes, there's no need to fear them too much if you sort them out early. When your income increases, when you start investing, or when you want to use deductions, it is most practical to prepare your records early rather than at the end of the year.
Source/reference materials
- National Tax Agency, Tax return preparation corner
- Confirmation date: 2026-05-30