The Indian Income Tax system is getting a major update! From 1st April 2026, a new law called the Income-tax Act, 2025 will come into effect.
One of the biggest changes? 👉 Income tax forms are being renamed and restructured.
Don’t worry — this blog explains everything in very simple language.

🔍 What Exactly is Changing?
Under the new law:
- Old forms under Income-tax Act, 1961 will be replaced
- Forms will have new numbers and structure
- Same purpose, but different form names
👉 Example:
- Old Form 15G / 15H → New Form 121
- Old Form 10A → New Form 104
📄 This is clearly shown in the mapping guide
💡 Why Did Government Change the Forms?
The goal is simple:
✔ Make tax laws more organized
✔ Remove confusion in sections and forms
✔ Align forms with the new Income-tax Act, 2025
🧾 How Will You See Forms on Income Tax Portal?
When you log in to the income tax portal, forms will be divided into 3 categories:
- Forms as per Income Tax Act 2025 (New forms)
- Forms as per Income Tax Act 1961 (Old forms)
- Forms as per Other Acts
👉 You must select the correct tab depending on the applicable law
📊 Important Form Changes (Easy Examples)
Here are some commonly used forms and their new numbers:
| Old Form (1961) | New Form (2025) | Purpose |
|---|---|---|
| 15G / 15H | 121 | No TDS declaration |
| 10A | 104 | Trust registration |
| 10AB | 105 | NGO approval |
| 15CA | 145 | Foreign payment declaration |
| 15CB | 146 | CA certificate for foreign payments |
| 26QB / QC / QD | 141 | TDS payment form |
👉 These mappings are taken from the official guide
🏢 What About Businesses & Professionals?
If you are:
- Business owner
- Chartered Accountant
- Tax consultant
- Company
👉 You will see changes in:
- Advance Pricing Agreement (APA) forms
- TDS/TCS forms
- International transaction forms
- Trust & NGO registration forms
Example:
- APA Application → New Form 51
- APA Renewal → New Form 54 (newly introduced)
🌍 Special Forms (Advanced Cases)
Some forms are related to:
- International Financial Services Centre (IFSC)
- Aircraft & ship leasing business
- Pension funds & mutual funds
These are mostly used by large companies and institutions
⚠️ Important Points to Remember
✔ Old forms will not disappear immediately
✔ Both old & new forms may exist during transition
✔ Always check correct form number before filing
✔ Wrong form = rejection or delay
🧠 Simple Conclusion
👉 Nothing is changing in your tax liability
👉 Only form numbers and structure are changing
So,
✅ Don’t panic
✅ Just use the correct form
✅ Take help if confused
🤝 Need Help?
If you are confused about:
- Which form to use
- Filing income tax return
- TDS / GST / business compliance
👉 Contact us at RB Associates & Tax Matters
We will guide you step-by-step.

