Free for tax professionals

Tax research that shows its sources

Ask a federal tax question. You get a plain answer with the law and IRS guidance behind it, so you can check it before you rely on it.

Free. No account needed.

Or try one

In the free portal

What you can do for free

  • Research

    Ask in plain English. The answer names the Code section, regulation or IRS guidance behind it, with a link to the source.

    Ask a question

  • Documents

    Watch a client packet get labelled, filed and checked for what’s missing. Use our samples or your own file. Nothing is kept.

    Try a packet

  • Build

    Describe a small tool, like a deadline list or a K-1 checklist, and it gets built in front of you. It runs in your browser.

    Build a tool

Sources

What it cites

Every answer comes from our own library of US federal tax law and IRS guidance, refreshed every week, with bulletins and news checked daily.

Current through

  • Internal Revenue CodeTitle 26, section by section
  • Treasury Regulations26 CFR, from the eCFR
  • IRS publications and instructionsWith page numbers
  • Internal Revenue BulletinsRevenue rulings, revenue procedures, notices
  • IRS news releasesThe last 24 months

For firms

We build it for your firm

The free portal keeps nothing and connects to nothing. For a firm, we set it up with your documents, the software you already use and your own review steps, and we build the workflows your team keeps doing by hand.

Talk to usSee what we build

Questions

Common questions

Is it really free?

Yes. Research, the sample documents and the tool builder are free, with no account. When it’s busy you may wait in a short line.

What does it cite?

The Internal Revenue Code, Treasury Regulations, IRS publications and instructions, the Internal Revenue Bulletins and IRS news releases. It doesn’t cover court cases or state law yet.

Does it keep my documents?

No. The free version doesn’t save your questions or files on our side, and it doesn’t connect to your other software. Your list of past research stays in your own browser.

Is this tax advice?

No. It’s research support for a licensed professional. Check every citation before you rely on it.

Can you set this up for my firm?

Yes. For a firm we connect it to the tools you already use, keep your documents where your policies say, and add your own review steps. Tell us what you need and we’ll scope it.

I used the old Tax Stack AI platform. Who do I contact?

Email taxstackai@gmail.com about your old account, billing or data.