The process of filing a final income tax return to determine and declare annual income and taxes owed; typically done by self-employed people or those claiming certain deductions.
来月、確定申告をしなければならない。
I have to file my tax return next month.
確定申告はe-Taxを使えば自宅で手続きできる。
You can file your tax return from home using e-Tax.
昨年は医療費控除のために確定申告をした。
Last year I filed a tax return to claim medical expense deductions.
確定申告の期限は通常、毎年3月中旬ごろだ。
The tax return deadline is usually around mid-March each year.