GUIDES AND API REFERENCE
Taxbit developer documentation
Collect tax documentation, calculate cost basis, and file information returns with the Taxbit API and React SDK.
Start with a task
Collect tax documentation
Collect W-9, W-8, DPS, and self-certification data in your app or through the API.
Report US tax forms
Send payments and recipient tax data, then retrieve the 1099 series, 5498, and 1042-S.
Report digital platform activity
Report seller income under DAC7 and MRDP.
Report digital asset activity
Collect self-certifications and report crypto-asset activity under CARF and DAC8.
Calculate cost basis and gains
Track lot-level inventory and read realized and unrealized gains.
Calculate Austrian withholding
Calculate Austrian withholding in real time.
What are you building?
Pick the path that matches your platform.
Payments platforms and US marketplaces
Collect W-9s and report 1099-K, 1099-NEC, and 1099-MISC at scale.
Digital asset exchanges and brokers (US)
Track cost basis, calculate gains and losses, and deliver tax forms to your account owners.
- Delivering Form 1099-DA? See Retrieve US tax forms →
- Reporting under CARF or DAC8? See CARF & DAC8 Reporting →
Marketplaces and gig platforms outside the US
Meet seller reporting obligations end to end under DAC7 and MRDP, the OECD's Model Rules for Reporting by Platform Operators.
Crypto-asset service providers
Prepare for CARF and DAC8 with tax-residency self-certification and transaction reporting.
Start with CARF & DAC8 Reporting →
- US broker reporting? See Cost Basis →
Explore by product
Get started
Authenticate, set up your filer and assets, create account owners and accounts, choose your data path, test, and go live.
US Information Reporting
The 1099 series, including 1099-DA and 1099-B for digital asset brokers, plus 1042-S and other US information returns.
Tax Documentation React SDK
Drop-in React component for W-9, W-8, DPS, and self-certification.
Cost Basis
Inventory, lot-level cost basis, and realized gains across cost-basis methods.
Austria Tax Withholding
Real-time Austrian withholding calculation, responsibilities, and integration flow.
MRDP & DAC7 Reporting
DAC7 and MRDP seller data collection, reporting, and recipient copies.
CARF & DAC8 Reporting
Crypto-Asset Reporting Framework and DAC8 compliance for crypto-asset service providers (CASPs).
Developer tools
Webhooks: set up an endpoint, verify signatures, and handle retries.
Webhook events: every event type and its fields.
Errors and rate limits: the shapes the API returns, what to retry, and the rate limits.