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 your integration → Explore the API reference

A typical reporting workflow

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.

Start with US Information Reporting →

Digital asset exchanges and brokers (US)

Track cost basis, calculate gains and losses, and deliver tax forms to your account owners.

Start with Cost Basis →

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.

Start with MRDP & DAC7 Reporting →

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.

Resources

FAQ for the questions integrators ask most, and the Glossary for the terms these guides use.

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