What this line means
Total nonrefundable credits in three columns. Nonrefundable credits reduce your tax but cannot reduce it below zero — they do not generate a refund on their own. This includes the child tax credit (nonrefundable portion), Credit for Other Dependents, education credits, foreign tax credit, and the Credit for the Elderly or Disabled. Column C is the corrected total.
Does this apply to you?
- You are adding a credit you did not claim on your original return
- You claimed a credit you were not eligible for and need to remove it
- You are correcting the amount of a credit due to changed income
- Your amendment changes AGI, which affects income-sensitive credit phase-outs
- You realized you qualify for the Credit for the Elderly or Disabled
Easy to overlook
Income changes affect credit eligibility and amounts Many nonrefundable credits phase out above certain income levels. The child tax credit phases out above $200,000 (single) or $400,000 (married filing jointly). Education credits phase out at lower thresholds. If your amendment changes AGI, recalculate every credit affected by income limits — not just the income lines. 1 IRS Form 1040-X Instructions — Line 7
Attach corrected Schedule 3 and supporting credit forms If line 7 changes, attach a corrected Schedule 3 (Additional Credits and Payments) and the specific credit form that changed (Form 8863 for education credits, Schedule R for elderly/disabled credit, Form 1116 for foreign tax credit). Missing supporting forms delay processing. 2 General filing pattern — recalculating income-sensitive credits
Watch out for this
Claiming a nonrefundable credit larger than the tax on line 6. Nonrefundable credits reduce tax to zero but no further. If the corrected tax is $500 and you claim $800 in nonrefundable credits, line 7 Column C is $500 (capped at the tax amount). The excess $300 does not carry forward unless the specific credit has its own carryforward rules.
Footnotes
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IRS Form 1040-X Instructions, Line 7. https://www.irs.gov/instructions/i1040x ↩
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IRS Schedule 3 (Form 1040) Instructions, Additional Credits and Payments. https://www.irs.gov/instructions/i1040s3 ↩