Coss Taxes: How to Import Your Historical Data & Generate Your Tax Report
Coss was a Singapore-based crypto exchange that closed in 2020. But closing does not erase your tax obligations — every trade you made on the platform remains a taxable event. CoinTracking accepts your Coss CSV export, calculates gains and losses across your full trading history, and generates a tax report ready for your accountant or tax authority.
How to Import Your Coss Transactions into CoinTracking
Watch how to upload your Coss CSV export into CoinTracking and generate your complete crypto tax report — even for historical data from a closed exchange.
Start Your Free Coss Import- Every crypto trade, swap, and disposal on Coss is a taxable event in most jurisdictions. Capital gains tax and income tax may both apply — regardless of whether the exchange is still operating.
- CoinTracking imports Coss transactions via CSV export (manual upload). Upload your Coss CSV file to import your full historical trading data including trades, deposits, withdrawals, and fees.
- Transferring crypto between your own wallets or accounts is not a taxable event. Buying and holding crypto is not taxable until disposal.
- Coss has been closed since 2020. You can still import historical data via CSV. Your tax obligations for trades made on Coss remain in effect — all gains, losses, and income must be declared for the relevant tax years. CoinTracking supports CSV import for historical Coss data.
Coss and Your Crypto Tax Obligations
Coss (Crypto One Stop Solution) was a Singapore-based cryptocurrency exchange that allowed users to trade a wide range of digital assets. The exchange shut down in 2020, but the tax obligations arising from trades executed on the platform remain fully in force for all affected tax years.
As a Singapore-based exchange operating outside the EU, Coss was not subject to EU DAC8 reporting requirements. However, depending on applicable regulations, user data may have been reported to relevant tax authorities. You remain personally responsible for declaring all taxable events from your Coss trading history.
CoinTracking supports Coss via CSV import:
- Coss CSV: upload your Coss trade history CSV export for a full import of all your trades, deposits, withdrawals, and fees
- All spot trades, disposals, and deposit/withdrawal history are supported
- Historical data from closed exchanges is fully compatible with CoinTracking's tax engine
- Generate back-tax reports for prior years if you have not yet declared your Coss activity
Crypto Tax Basics: What Coss Users Need to Know
Coss served traders across multiple jurisdictions worldwide. The core tax principles below apply broadly — but always verify the specifics with your local tax authority or a qualified tax advisor.
Every disposal is a taxable event
In most countries, selling, swapping, or otherwise disposing of cryptocurrency triggers capital gains tax. The gain or loss equals the difference between your proceeds and your cost basis (what you originally paid, including fees). This applies to each individual trade made on Coss — even historical ones from previous tax years.
Obligations survive exchange closure
The closure of Coss does not eliminate your tax obligations for trades made while the exchange was active. Tax authorities in most jurisdictions can assess back-taxes for unreported gains, often going back several years. If you have not yet declared your Coss trading history, you should file retroactively using your historical CSV data. CoinTracking can generate tax reports for any prior year from your imported data.
Record-keeping with CSV exports
Since Coss is no longer operational, your CSV export file is the primary record of your trading history. Every trade is documented with the date, asset, quantity, cost basis, proceeds, and fees. Importing this data into CoinTracking converts it into a structured tax report with a full audit trail, formatted for your jurisdiction.
Coss Taxes by Country
Coss served traders worldwide. Crypto tax rules differ by market — below are the key rates, deadlines and filing rules for the countries where CoinTracking users most commonly report their Coss history.
United States
- Short-term gains: Taxed as ordinary income (10%–37%) if held under 12 months
- Long-term gains: 0%, 15%, or 20% depending on income if held over 12 months
- Cost basis: FIFO or specific identification permitted by IRS
- Authority: Internal Revenue Service (IRS)
- Forms: Schedule D, Form 8949
Germany
- Disposal tax: Personal income tax rate (up to 45%); gains are tax-free if held longer than 1 year (Haltefrist)
- Annual exemption: Gains up to €1,000/year are tax-free
- Business income: If trading is a business activity, profits are taxed as Gewerbeeinkünfte (trade income)
- Cost basis: FIFO per wallet
- Authority: Finanzamt
- Forms: Anlage SO, Anlage KAP
United Kingdom
- Capital Gains Tax: 18% (basic rate) or 24% (higher rate) from October 2024
- Annual exempt amount: £3,000 (2024/25 onward)
- Trading income: If HMRC classifies activity as a trade, profits are subject to Income Tax at marginal rates
- Cost basis: Section 104 pool (HMRC rules)
- Authority: HMRC
- Forms: Self Assessment SA100, SA108
Austria
- 27.5% capital gains tax: Since March 2022, crypto is taxed like shares — a flat 27.5% KESt applies to gains.
- Old coins grandfathered: Crypto acquired before 28 February 2021 is tax-free on disposal.
- Business income: Professional trading activity may be taxed as business income at progressive rates.
- Authority: Finanzamt Austria. Report via Einkommensteuererklärung (E1 / E1kv).
Switzerland
- Capital gains: Generally tax-free for private investors; professional traders are taxed as self-employed income
- Wealth tax: Crypto holdings subject to wealth tax at cantonal rates based on year-end market value
- Business trading: High-frequency or leveraged trading may be classified as professional activity and taxed accordingly
- Authority: Cantonal tax authority (varies by canton)
Spain
- Savings income (IRPF): 19% up to €6,000; 21% up to €50,000; 23% up to €200,000; 27% up to €300,000; 28% above
- Foreign crypto disclosure: Modelo 721 required if portfolio exceeds €50,000 abroad
- Business activity: Classified as rendimientos de actividades económicas if trading is a professional activity
- Authority: Agencia Tributaria (AEAT)
- Forms: Modelo 100 (IRPF), Modelo 721
Poland
- Flat rate: 19% on all crypto gains (no holding period exemption)
- Loss carryforward: Up to 5 years
- Business income: Professional crypto trading may be taxed under business income rules
- Cost basis: FIFO
- Authority: Urząd Skarbowy
- Form: PIT-38
Italy
- Flat rate: 26% on gains exceeding €2,000/year (from 2023)
- Foreign holdings disclosure: Quadro RW required if portfolio exceeds €15,000
- Business income: Corporate and professional traders taxed under IRES/IRPEF rules
- Authority: Agenzia delle Entrate
- Forms: Quadro RT (gains), Quadro RW (foreign holdings)
France
- Flat 30% tax (PFU): Gains from crypto disposals are subject to the prélèvement forfaitaire unique (PFU) — 12.8% income tax + 17.2% social charges.
- No exemption for holding period: Unlike Germany, there is no tax-free threshold after 1 year.
- Professional traders: High-frequency trading may be classified as BNC (non-commercial income) at progressive rates.
- Authority: Direction générale des Finances publiques (DGFiP). Declare via Formulaire 2086.
Tax rules change frequently. This overview is for general information only and does not constitute tax advice. Consult a qualified advisor for your specific situation.
Are Coss Transactions Taxable?
In most jurisdictions, crypto is treated as an asset: disposing of it triggers capital gains tax. These rules apply to your historical Coss trading data — even after the exchange has closed. Use this as a starting reference — exact rules vary by country.
Taxable Events
- Selling crypto for fiat (USD, EUR, SGD, etc.)
- Swapping or trading crypto for crypto
- Using crypto to pay for goods or services
- Referral rewards and trading bonuses received
Not Taxable
- Buying and holding crypto
- Transferring crypto between your own accounts
- Depositing fiat to Coss
- Receiving crypto as a personal gift
Tax treatment varies by country. CoinTracking applies the rules for your selected jurisdiction automatically.
How to Calculate Your Coss Taxes
Even if Coss has closed, you still need to account for every trade you made on the platform. Calculating cost basis, holding periods, and gains for each individual transaction — potentially spanning multiple years — is impractical without automation.
CoinTracking imports your complete Coss trade history via CSV, applies your chosen cost-basis method (FIFO, LIFO, HIFO, and others), calculates gains and losses for every disposal, and produces a jurisdiction-specific tax report. Historical data from prior tax years is fully supported — you can generate back-tax reports for any year covered by your Coss CSV file.
The result is a tax report — PDF or Excel — that your accountant or tax authority will accept, with a full audit trail for every transaction.
How to Import Coss into CoinTracking
Three steps to upload your Coss CSV and generate your tax report.
- 1
Log into CoinTracking and open Imports
After logging in, click the Import icon in the left navigation. This is where you connect all your exchanges, wallets and blockchains.
- 2
Search for Coss in the import list
Type "Coss" in the search field. CoinTracking will show the Coss import option — select it to proceed with your CSV upload.
- 3
Upload your Coss CSV file
Upload your Coss trade history CSV export. CoinTracking will import all your historical trades, deposits, withdrawals, and fees automatically and calculate your tax position.
"CoinTracking can handle just about any complex transaction you can throw at it and the automation is a real lifesaver. Of all the tax software tools we've reviewed, CoinTracking is the most detail-oriented and has more accuracy checks in place than the competition."
How to Create Your Coss
Tax Report with CoinTracking
Three steps from CSV upload to a tax report your accountant will accept.
Upload your Coss CSV
Download your Coss trade history CSV and upload it to CoinTracking via the Coss import. CoinTracking imports all historical trades, deposits, withdrawals, and fees automatically.
Review your transactions
Open Reports → Validate Transactions. CoinTracking flags missing cost basis entries, duplicate imports and price gaps so your final report is accurate — essential for historical data from closed exchanges.
Generate and export your tax report
Select your country and tax year. CoinTracking generates a report formatted for your jurisdiction: PDF or Excel, ready to file or hand to your accountant.
No. Coss was a Singapore-based crypto exchange that closed in 2020. It did not generate a ready-to-file tax report. If you still have your old Coss CSV export, you can import it into CoinTracking. CoinTracking then calculates gains, losses, and income across your full trading history and generates a compliant tax report for your jurisdiction.
You can still import your historical Coss trading data into CoinTracking using a CSV file. If you exported your trade history from Coss before it closed, navigate to CoinTracking → Import Data → search for "Coss" and upload your CSV file. CoinTracking will parse all your historical trades, deposits, and withdrawals automatically. If you no longer have the CSV file, you may need to check whether your account data is still accessible or contact Coss's administrators.
Yes. Every sale, swap, or disposal of cryptocurrency through Coss is a taxable event in most jurisdictions. Capital gains tax applies to the difference between your cost basis and the proceeds at the time of each trade. Income received — such as referral rewards — is also typically taxable. These obligations apply even now that Coss has closed: the historical transactions you made on the platform must still be declared for the relevant tax years.
Yes. The closure of Coss does not change your tax obligations for trades executed while the exchange was active. Tax authorities in most jurisdictions require you to report all crypto disposals for the relevant tax years, regardless of whether the exchange still operates. If you have not yet declared your Coss trading history, you should do so retroactively — CoinTracking can process historical CSV data to generate back-tax reports for past years.
Coss was a Singapore-based exchange and was not an EU-regulated CASP, so EU DAC8 reporting rules did not apply. However, depending on its regulatory obligations, Coss may have reported certain user data to Singapore or other relevant tax authorities. Regardless of any exchange-level reporting, you remain personally responsible for declaring your crypto gains, losses, and income from your Coss activity in your annual tax return.
The correct cost-basis method depends on your jurisdiction. In the US, FIFO (First In, First Out) is widely used, though specific identification is also accepted. In Germany, FIFO per wallet is the recognised method; in the UK, HMRC's Section 104 pooling rule applies. CoinTracking supports FIFO, LIFO, HIFO, and other methods — you can switch between them and instantly recalculate your Coss tax report to find the most tax-efficient outcome for your situation.
Start Tracking Your Crypto Taxes Today
Experience why 2.2 million users trust CoinTracking — sign up today for a seven-day free trial!