What Form 121 is meant to solve
The new self-declaration framework aims to reduce duplicate 15G/15H style submissions and align deductors with income-tax portal data. Taxpayers should verify current portal availability and deductor instructions before relying on it.
Who should review applicability
- Senior citizens with FD interest.
- Individuals with total income below taxable limit.
- EPF withdrawal cases where TDS can apply.
- Dividend or interest recipients with no final tax payable.
- Taxpayers with multiple deductors.
Process to expect
Estimate annual income
Include salary, pension, interest, rent, capital gains and other income.
Check tax liability
Declaration is only safe where conditions are met.
Submit declaration
Use the prescribed portal/deductor route.
Share reference
Give deductor acknowledgement/reference where required.
Common mistakes
- Assuming last year declaration continues.
- Declaring below actual income.
- Forgetting multiple banks/deductors.
- Ignoring AIS/Form 26AS after TDS deduction.
Form 121 Self-Declaration: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
FAQs
Which year should I use for Form 121 Self-Declaration?
Use AY 2026-27 for FY 2025-26 income under the Income-tax Act, 1961. Use Tax Year 2026-27 for FY 2026-27 income under the Income Tax Act, 2025.
What documents should I share with a tax expert?
Share the portal screenshot, exact year, income breakup, certificates, AIS/Form 26AS, notices, challans and any computation already prepared.
Can WorkIndex help me find a specialist?
Yes. Post a requirement with the legal year, records and deadline so experts can quote on the real issue instead of a generic page title.
Form 121 Self-Declaration: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for Form 121 Self-Declaration
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.
Form 121 Self-Declaration: year and source check
Last fact-checked: 25 May 2026.
AY 2026-27 means FY 2025-26 income under the Income-tax Act, 1961. Tax Year 2026-27 means FY 2026-27 income under the Income Tax Act, 2025. Do not mix the two labels.
Use official portal pages, CBDT notifications, the supplied Act PDF and ICAI material before making a filing, payroll, TDS/TCS or rebate decision.
What to verify for Form 121 Self-Declaration
- Correct financial year, assessment year or tax year.
- Taxpayer type, age category, residential status and business/profession status.
- Exact income heads, including salary, house property, business/profession, capital gains, VDA and other sources.
- AIS/TIS, Form 26AS, TDS/TCS certificates, challans and portal pre-fill.
- Deductions/exemptions allowed in the selected regime and current ITR utility validation rules.
- Whether the issue is a calculation, filing, notice response, rectification, appeal or advisory position.