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Step-by-step guide

How to Export Your Raw NNS CSV

NNS Tax Pro reads the CSV export from the Network Nervous System dApp. Follow these eight short steps to download your account history — no technical knowledge required.

1

Open the NNS dApp

In your browser, go to nns.ic0.app (or nns.icp0.io). The Network Nervous System dashboard loads — this is the official app for managing ICP accounts, neurons, and canisters. No download is required; it runs entirely in your browser.

2

Sign in with Internet Identity

Click “Log in” and authenticate with your Internet Identity. You may be asked to confirm with your passkey device or YubiKey. Once signed in, you'll see your dashboard with your linked accounts.

3

Open the Accounts section

From the left-hand navigation, click “Accounts”. This shows every ICP account linked to your identity, including your main account and any sub-accounts you've created.

4

Select the account to export

Click on the account whose transaction history you want to export. The account detail view opens, showing your ICP balance and a list of recent transactions (sends, receives, stakes, and airdrops). Set the date range you want to cover.

5

Export the account history as CSV

In the account detail view, click the “Export” (or “Download CSV”) button. Your browser downloads a CSV file containing every transaction for that account. Repeat steps 4–5 for each account you want to include in your tax calculation.

6

Add your data

Drag & drop your CSV file or paste transaction text directly. Data is parsed and calculated automatically—no extra buttons to click.

7

Clear your inputs

To start over or try another file, click "Clear Data" to reset your inputs in one click.

8

Generate your report

Clicking 'Generate Report' creates a print-friendly SA108 Capital Gains Schedule ready for PDF export or UK tax filing.

Got your CSV? Run the calculation.

Open the dashboard, upload your exported NNS CSV, and preview your UK Section 104 summary free — no sign-in required to preview.