Python scripts
2026 Form 1040 & Schedule C Estimator: Python Script for Self-Employment Tax and Quarterly Payments
Type in revenue and expenses and see profit, self-employment tax, taxable income, federal tax and what to pay each quarter, from a script you run locally with no subscription.
$39 one time · 14-day full refund · scripts and samples · download link by email
🌙 The desk is asleep. The store never is.
Every kit and ebook downloads the moment you pay, day or night. Questions get answered after we open in the morning.
Browse the storeWho it is for
Freelancers, sole proprietors and single-member LLC owners who want a quick, private planning estimate, and bookkeepers who prepare estimates for clients.
Not the right fit if
You want to file a return: this is a planning estimate you run in Python, not tax software.
Why it is different
- Every 2026 figure sits in one data file with its official source named, so you can check it and update it next year.
- Runs locally on Python's standard library: your numbers never leave your computer.
- Says what it leaves out (capital gains, credits, phase-outs, other states) instead of hiding it.
What is inside
- The script. One command line tool: status, revenue, expenses, W-2 wages, withholding, credits, prior-year tax and an optional NJ estimate.
- 2026 data file. Brackets, standard deduction, Social Security wage base, QBI threshold and NJ tables in one JSON file, each with its source.
- Quarterly schedule. The four estimated payments with their due dates and the safe-harbor logic shown.
- Example input. A made-up example you can copy and change.
Get it
2026 Form 1040 & Schedule C Estimator (Python)
Or pay with PayPal
Uses the email and terms box above. You get the same download link by email.
Want every toolkit? The toolkit membership includes all of them, with a lower rate if you pay yearly.
Get every update for a year, $29: the Yearly Updates Pass gives you each refreshed edition we release of the kits you own. One payment, no automatic renewal.
Delivered as a zip of Python scripts with sample files. Needs Python 3.8 or newer. A planning estimate, not tax software, and not tax, legal or accounting advice. Figures come from IRS Rev. Proc. 2025-32, the Social Security Administration and the NJ Division of Taxation; check them before relying on a result. No result is promised. Payment is handled by Stripe. If a file will not open or something looks wrong, reply to your order email and we will make it right.
Ways to get it
Just this kit, or more
Membership
$29 a month
Every kit and document pack in the store, including new ones. Cancel any time.
See the membershipQuestions
Common questions
What do I get and how is it delivered?
The 2026 Schedule C Tax Estimator comes as a zip with the scripts (schedule_c_estimator.py and taxlib.py), sample files to try first and a README with the commands. The download link arrives by email after payment.
Will it run on a Mac, Windows or my phone?
It needs Python 3.8 or newer on a Mac, Windows or Linux computer, so it will not run on a phone. If a file will not open or something looks wrong, reply to your order email and we will make it right. If it is not right for you, email us within 14 days of buying for a full refund.
Is this legal or tax advice?
A planning estimate, not tax software, and not tax, legal or accounting advice.
Which tax year does it use?
It uses 2026 figures from IRS Rev. Proc. 2025-32, the Social Security Administration and the NJ Division of Taxation. Every figure sits in one data file with its source named, so you can check it and change it yourself for a later year. Updates for later years are not promised.
Buy it with the others