Final tax return, company filed and Kojin Jigyo

Hello,

I feel like this question is answered in the final tax return page of the nta, but I'm not sur to understand, so I'd prefer to ask here. The terminology is probably all wrong, my first language is not English and I'm doing my best with that vocabulary that I am not familiar with, sorry about that.

My situation is as follow :

  • I have a full time job at a company that files the taxes on my behalf. I make about 8.5M through this job
  • I have a Kojin Jigyo with which I make 1 to 2M a year. This has been "opened" in July, taking the "blue form" option.

What I wanted to do was :
– Company files my income taxes
– I file the Kojin Jigyo taxes using the blue form

Taxes are then paid independently.

But today, my company has sent me an email asking if I want to file the tax return on my own. And do the "year end tax adjustment" (needs to be done by the end of the week), of file the taxes on my own. There is some details about to whom it applies, and miscellaneous income is mentioned. But if I understood correctly, Kojin Jigyo tax filing is done from January to March of the following year (fiscal year being from January to December)

I am a bit lost, could someone tell me where I am right and where I am wrong ? Thank you !

by MrDontCare12