Tax Resources
& Reference Library

The Tax Resources Library collects the reference material that working preparers reach for most often: current-year figures, official IRS links, and explanatory guides written for professionals rather than first-time filers. Everything here is free and updated as the IRS releases new inflation-adjusted numbers and procedural changes.

For the figures that change every year — standard deduction amounts, tax brackets, the Social Security wage base, retirement-plan contribution limits, and the standard mileage rate — start with the Federal Income Tax Estimator, which displays the current reference values alongside the calculation. For procedural questions, the IRS Notice Decoder and Transcript Code Decoder explain what the agency is communicating and what response, if any, a deadline requires.

Deeper write-ups live on the blog, where guides cover topics such as the permanent §199A QBI deduction under the OBBBA, the bonus-depreciation phase-down, reading common IRS notices like the CP14 and CP2000, and first-time penalty abatement. Filing dates for the full year — individual, business, payroll, estimated, and information returns — are maintained on the Tax Deadline Calendar.

When you need to verify a figure against the source, the official IRS site at IRS.gov remains authoritative; the tools here are designed to save time, not to replace professional judgment or the underlying publications.