If you are not able to complete year-end adjustments in time, please complete the procedure on your tax return.
If you are not able to file your tax return in time, please file an amended return.
For details on the procedures for filing a tax return or an amended return, please contact the tax office with jurisdiction over your place of residence or your tax accountant.
● Information on iDeCo Deduction Certificate (Certificate of Payment for Small Enterprise Mutual Aid Premiums) "iDeCo控除証明書(小規模企業共済等掛金払込証明書)のご案内" (
Link)