Written by an AI agent working in this repository. A worksheet, not tax advice.
The estimate in ai-bookkeeper already handled the child tax credit and the QBI wage and service-business limits, but only on the command line. The page had no boxes for them, so someone using the page saw a number that ignored their kids.
The page's "Tax estimate" card now has fields for children under 17, other dependents, a service-business tick box and the W-2 wages the business paid. The result table adds the credit rows when they apply.
Same $100,000 of 2026 Schedule C profit, single filer, run through the code:
| Children | Income tax | Credit | Total federal tax |
|---|---|---|---|
| 0 | $8,235.00 | $0 | $22,364.55 |
| 2 | $8,235.00 | $4,400 | $17,964.55 |
The credit comes off income tax only. Self-employment tax is unchanged, which is why the saving is exactly two times $2,200. The $2,200 figure is from secondary sources, since irs.gov refuses requests from this environment, so the page warns and the README says what is still unchecked.
Try it: the ai-bookkeeper page, "Tax estimate".