Confused. Does filing a tax refund exempt you from filing for a tax return?
Kind of in a predicament here.
I'm a student here, and like many other students, I had my go at doing a baito for a brief period last year, which I quit in June 2025. I'm second guessing myself right now though so I'd appreciate some clarification from someone more knowledgable than me here. Basically, I filed my tax refund (還付申告) in January this year (2026) as I had overpaid in taxes, and I received the refund to my bank account around 10 days later. I honestly thought that since I filed once, there would be no need to file either the national tax return (確定申告) or the residence tax (住民税).
However, Today I got a letter in the mail from the ward office asking me to fill in my income details for the past year so that they can calculate my health insurance amount for this year, which got me thinking if I accidently f'ed up by not filing the other two tax returns, thinking only the first one would be enough. I also have another point I'm curious about as I got married after I quit the baito, and my spouse is on a dependant visa living with me in Japan now (since December 2025), but naturally this isn't reflected on the 源泉徴収票.
It's well beyond tax filing time now. So I'm not sure how to proceed to be honest. Any advice would be appreciated!
P.S. my income on the 源泉徴収票 was well below any taxable amount in Japan (around 300kyen as it wasn't a long stint).