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《Industry's Lowest Price (*)! Free Tax Filing App to Start Using》

"Tax Filing FinFin" is an accounting app that lets you handle everything from daily accounting to tax filing with just your smartphone.

It's also suitable for freelancers, sole proprietors, and those with side jobs!

*Based on our own research (as of January 2026) as a "smartphone-based tax filing app"

【What's Great About Tax Filing FinFin!】

◆ Easy Deductions with "Full Deduction"!

Simply upload your documents and the deduction details will be automatically reflected!

Leave all the calculations to the app!

(Supports medical expense deductions, self-medication tax system, and charitable contribution deductions)

◆ Three Modes to Choose From (Business Mode, Easy Side Job Mode, Deduction Only Mode)

"I don't know which mode is right for me..."

For those of you who feel this way,

Simply answer the questions in the app, and we'll recommend the mode that's right for you!

Choose the mode that suits you best for smooth tax filing.

◆Electronic filing is also available!

Answer yes/no questions to create your tax return and submit it from home.

(Supports both blue and white tax returns)

◆Input-free daily accounting tasks

99% of financial institutions can be linked to your account.

Credit card and bank transactions can be automatically journalized.

◆Easy journalizing by simply "taking a picture" of your receipts

Continue tedious accounting tasks in your spare time.

◆My Number Portal integration

Information necessary for tax filing is automatically reflected.

Withholding tax slips and medical expense deductions can be imported.

【Other features include!】

・View sales and expenses in graphs on the home screen!

・Register journal entries and record daily transactions on the journal entry screen!

・Automatic journalizing by simply taking pictures of receipts, invoices, and bills with your camera!

・Link bank account and credit card transaction details on the account screen for automatic journalizing!

・Electronic money integration is also available!

* Import your withholding tax slips and medical expense deductions via My Number Portal!

* Import donation deduction certificates issued by hometown tax donation websites!

* Easily create your tax return by simply answering yes/no questions!

* Submit your tax return within the app! (e-Tax integration)

[FinFin Tax Return is recommended for people like you!] 】

・For those who are anxious about filing a tax return for the first time

・For those who have filed a tax return before but still have lingering doubts

・For those who want to easily file a tax return by keeping daily entries short of time

・For those who want to easily input daily transactions

・For those who want to automatically import bank account and credit card transactions

・For those who want to continue accounting anytime, anywhere, in their spare time

・For those who want to easily manage documents necessary for expense reimbursement with receipt scanning and receipt reading functions

・For those who want to easily handle information necessary for deductions such as medical expense deductions and hometown tax donations

・For those working as freelancers or sole proprietors

・For those working a side job

・For company employees who forgot to do year-end adjustments

・For those who want an accounting and tax filing app that can be completed entirely on a smartphone

・For those who are confused by various apps and are looking for a reliable app

【You can create these kinds of documents! 】

* Blue Return Settlement Statement

* Income and Expenditure Statement

* Income Tax Return

* Consumption Tax Return

【FinFin Official Website for Tax Filing】

https://www.finfin.jp/sp-kaikei/kaikei.html

【Contact Us】

Please feel free to contact us if you have any problems.

https://faq.finfin.jp/hc/ja/requests/new

【Privacy Policy】

https://www.finfin.jp/privacy/

【Terms of Service】

https://www.finfin.jp/terms/terms01.html