My spouse's company already claimed their parents in year-end adjustment. Can I still claim my own parents?

Detailed explanation

Dependent deductions apply separately by blood relationship: you may claim your parents, your spouse may claim their parents—no conflict. The issue is the same parent cannot be claimed by two people, including you and your spouse together. If your spouse mistakenly listed your parents on their company's year-end adjustment, they must correct through the company or file a Correction Request with the tax office. Prepare separate remittance records and relationship proof. If siblings each support one parent, one claiming father and one claiming mother is also possible by agreement. The tax office verifies relationships and support facts.