CoinLedger (formerly CryptoTrader.Tax) runs exactly one discount right now, and their help center says so explicitly: "Right now our only active discount is for 15% off of tax reports for 2018 and previous years' reports." That entry is on this page. If you need 2019 or later reports, there is currently nothing to redeem.
The second route is the referral program: signing up through a CoinLedger referral link applies a 10% discount automatically at checkout - "they'll see a 10% discount automatically applied to their account on the checkout page", no code needed. The referrer earns a 25% recurring commission, paid to PayPal after the balance reaches $30 and a 30-day clearing period. One relevant restriction: the affiliate terms prohibit coupon-aggregator referrals, so links pasted into code-list sites are not honored.
Practical takeaway
For older tax years, take the 15% directly. For current-year reports, the 10% referral discount is the best documented route. Both were verified on CoinLedger's own help pages on 2026-11-08.