Question 1

What does Tax Twin cover, and what does it refuse?

Accepted Answer

It covers a resident individual below 60 with salary, interest, dividends and sales of listed shares or equity mutual fund units, up to Rs 2 crore of total income under each regime. It refuses age 60 and above, NRIs and HUFs, business, trading and F&O income, house property, and sales of other assets such as property, gold, unlisted shares or debt funds. When it refuses, it says why instead of showing a number.

Question 2

Why does Tax Twin want one row per purchase lot?

Accepted Answer

If you bought the same share on different dates and sold part of it, each purchase can have its own cost and its own holding period, and that decides the rate. Your broker or depository statement already applies first-in-first-out (Section 67(7)(c)) to pick which purchase was sold. Tax Twin does not match lots for you, so copy one row per purchase lot from that statement.

Question 3

What does a "Chartered Accountant Review" flag mean?

Accepted Answer

A flag appears when the law can be read in more than one way and the other reading would change your final tax. It names the reading Tax Twin used so you can ask your own Chartered Accountant which one applies to you.

Question 4

Where is my data stored?

Accepted Answer

In your browser. The calculation runs on your device. Analytics and the optional feedback form are separate; see the Privacy page. Saved plans sit in your browser's localStorage, so they stay on that browser and device. Use Export File in Saved Plans to keep a copy and Import File to load it elsewhere. Clearing site data removes saved plans, so export first. Anything is sent only if you choose to submit feedback or report an issue.

Question 5

What are the year-end moves, and are they a separate calculation?

Accepted Answer

They are changes you could still make before 31 March: topping up Section 123 investments to Rs 1,50,000 or your own NPS to Rs 50,000 (Old regime), booking a loss you have not yet realised, holding a planned short-term sale past 12 months, and booking long-term gain inside the Rs 1,25,000 limit. Each move re-runs the same calculation on a changed copy of your numbers and shows before and after. A saving under one regime is not a saving against the other if that regime already has the lower tax.

Tax Twin: Old vs New Regime for the Whole Year