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Every Tool You Need to
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Purpose-built tools for CPAs, Enrolled Agents, and Tax Preparers — plus simplified guides for individuals filing their own returns.

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40+ Tax Tools
2026 Tax Year Ready
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IRS Forms Library
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Tax Acronym Decoder — 136 terms
every tax preparer encounters

AGI, MAGI, QBI, SSTB, UBIA, TCJA, OBBBA, TFRP, AOTC, NIIT, FBAR, CSED — searchable glossary with practitioner context, form references, and deep links you can paste in client emails. Free, no signup.

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Who It's For

Built for Every Tax Professional

From solo practitioners to large firms — and individuals navigating their own returns.

🏛️
CPAs
Advanced tools for complex returns, multi-state filings, business clients, and practice management.
📋
Enrolled Agents
IRS representation tools, audit defense calculators, and penalty abatement resources.
💼
Tax Preparers
Checklists, client organizers, e-filing guides, and quick-reference tax tables.
🏠
Individuals
Simple calculators, deduction finders, W-4 helpers, and plain-English tax explainers.
🏢
Small Businesses
Entity comparison, payroll tax estimators, quarterly payment tools, and depreciation calculators.

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The Toolkit

50+ Tax Tools, All in One Place

From simple calculators to advanced professional utilities — always current, always free for core features.

2025 Calendar

Key Tax Deadlines

Never miss a filing deadline again. Updated for 2025 tax year.

Jan 15, 2026
Q4 2025 Estimated Tax Payment
Self-employed, sole proprietors, high-income individuals
2026
Jan 31, 2026
W-2 & 1099 Deadline
Employers must furnish to employees / contractors
2026
Mar 17, 2026
S-Corp & Partnership Returns (Form 1120-S / 1065)
Business entities — 6-month extension available
Upcoming
Apr 15, 2026
Individual Tax Return Deadline (Form 1040)
All individuals — extension to Oct 15 available
Upcoming
Apr 15, 2026
Q1 2026 Estimated Tax Payment
Self-employed and individuals with non-wage income
Upcoming
Jun 16, 2026
Q2 2026 Estimated Tax Payment
Self-employed and individuals with non-wage income
Later
Sep 15, 2026
Q3 2026 Estimated Tax Payment
Self-employed and individuals with non-wage income
Later
Oct 15, 2026
Extended Individual Return Deadline
For those who filed a 6-month extension in April
Later
Library

Reference Resources

Quick-access guides, tables, and references for professionals and individuals.

📋 New · OBBBA Guide
All 2025 OBBBA Tax Changes
The complete guide to the One Big Beautiful Bill — every new deduction, the bigger credits, and what's now permanent, with calculators for each.
🚗 New · OBBBA
Car Loan Interest Calculator
Estimate the new deduction for interest on a qualifying U.S.-assembled vehicle loan — up to $10,000 a year for 2025–2028.
⏱️ New · OBBBA
No Tax on Overtime Calculator
Estimate the new deduction for overtime — up to $12,500 (single) or $25,000 (joint) of the FLSA premium for 2025–2028.
🧾 New · OBBBA
No Tax on Tips Calculator
Estimate the new One Big Beautiful Bill deduction for qualified tips — up to $25,000 for 2025–2028, with the income phase-out.
🔍 Decoder
IRS Notice & Letter Decoder
Look up any IRS notice or letter — CP05, CP59, CP2000 and dozens more — in plain English, with what each one means and what to do next.
🚫 Reference
IRS E-File Reject Codes
The most common e-file rejection codes — IND-031-04, R0000-507-01, F8962-070 — and exactly how to fix and refile each one.
🧾 Decoder
IRS Transcript Code Decoder
Decode the transaction codes on an IRS account transcript — 150, 570, 846, 971 and more — to read exactly where a return or refund stands.
📊 2026 Guide
2026 Tax Brackets & Standard Deduction
The complete 2026 federal brackets, standard deduction, capital-gains, and credit figures — verified against IRS Rev. Proc. 2025-32.
📊 Reference Table
2025 Federal Tax Brackets
Complete rate tables for all filing statuses, updated for inflation adjustments.
📋 Checklist
New Client Intake Checklist
Comprehensive document checklist to onboard individual and business clients efficiently.
📘 Guide
IRS Penalty Abatement Guide
Step-by-step guide for requesting first-time penalty abatement and reasonable cause relief.
🔢 Reference Table
Standard Mileage Rates 2025
IRS standard mileage rates for business, medical, charity, and military use.
📄 Form Guide
Form W-4 Line-by-Line Guide
Explain W-4 to clients with this plain-English walkthrough for the current form version.
💡 Explainer
QBI Deduction Simplified
Qualified Business Income deduction explained — eligibility, limitations, and pass-through entity rules.
🏢 Guide
S-Corp vs LLC Comparison
Side-by-side entity comparison for tax planning purposes including self-employment tax savings analysis.
📊 Reference Table
Depreciation Quick Reference
MACRS recovery periods, bonus depreciation rates, and Section 179 limits for 2025.
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