Documentation
Everything you need to get started with TaxWhizz.ai. From account setup to API integration, find comprehensive guides for every feature.
Getting Started
Quick Start Guide
Create Your Account
Sign up in under 60 seconds. Free tier includes 5 calculations per month with full access to basic calculators.
Choose Your Plan
Select from Free, Starter, Professional, or Business plans. All paid plans include a 7-day free trial.
Run Your First Calculation
Navigate to Tax Calculators and select any of the 14 HMRC-aligned calculators. Enter your figures and get instant results.
Explore Pro Tools
Unlock 20 professional computation engines including SA100, CT600, CGT, IHT, Payroll, and more.
Platform Overview
Dashboard
Your command centre for all tax intelligence. Real-time KPIs, activity feed, quick tools grid, and status overview.
Tax Calculators
14 HMRC-aligned calculators covering Income Tax, NI, CGT, Corporation Tax, VAT, Dividend Tax, Stamp Duty, and more.
Pro Tools
20 professional computation engines — SA100, CT600, CGT with pooling & B&B rules, IHT, Payroll, R&D Credits, and more.
AI Tax Chat
Natural language tax queries powered by Claude AI with RAG retrieval across 91 UK tax law knowledge chunks.
Document Upload
AI-powered document analysis and data extraction. Upload P60s, P45s, SA302s, and more for automatic processing.
HMRC Submissions
Direct filing for SA100, CT600, and VAT returns. Validate, queue, and submit directly to HMRC from the platform.
API Quick Start
Integrate TaxWhizz.ai into your own applications with our REST API. Here's a quick example to calculate income tax:
curl -X POST https://api.taxwhizz.ai/api/v1/calculators/income-tax \
-H 'Authorization: Bearer YOUR_TOKEN' \
-H 'Content-Type: application/json' \
-d '{"annual_income": 85000, "tax_year": "2025/26"}'