IRS calculators, notice and transcript-code libraries — tax answers cited to the rule.
Free calculators, notice guides, and transcript tools for IRS representation and collections work. Each result cites the governing IRM section or IRC subsection, so you can check it, not just trust it.
Start with a problem: Collections · Penalties · Transcripts
- Calculators and routers
- 30
- IRS notice and letter guides
- 80
- Transaction-code guides
- 193
- Shareable result pages
- new
Read the Desk
One collections or representation problem, worked end to end, every claim sourced.
The handful of federal changes each week that actually require action, with primary-source citations.
Why the IRS does what it does — the procedure underneath the notice.
One-page references you can keep next to the phone.
Calculators
Collections
- CSED Calculator
Every tolling event, statute expiration date shown
- IA Payment Calculator
Sizes an IRS installment agreement under IRM 5.14
- CNC Eligibility Calculator
Hardship Currently Not Collectible eligibility, IRM-cited
- OIC Pre-Qualifier
Tests offer-in-compromise viability with the RCP formula
- Collection Alternative Router
Routes a case to a payment plan, hardship status or offer
- Form 433 Auto-Populator
Turns a transcript into a Form 433 estimate
Penalties and disputes
- Penalty Abatement Analyzer
Checks AEP, FTA and reasonable-cause penalty relief eligibility
- Penalty Relief Router
Routes a penalty across AEP, FTA, reasonable cause
- Innocent Spouse vs. Injured Spouse Router
Routes between innocent spouse and injured spouse relief
- Appeal Channel Router
Routes a dispute to the right appeal channel
- IRS Penalty and Interest Calculator
Late-filing and late-payment penalties plus interest, line by line
- Penalty Abatement Letter Builder
Drafts a penalty relief request letter from your facts
Transcripts, income, practice
- IRS Transcript Decoder
Look up 189 transaction codes in plain English
- QBI Deduction Calculator (Section 199A)
Calculates your Section 199A deduction, with limits
- SE Tax vs. S-Corp Calculator
Finds the income level where an S-corp wins
- Reasonable Comp Benchmarker
Builds a defensible reasonable-compensation range
- Trump Account Employer Nondiscrimination Test
Tests Trump Account contributions for nondiscrimination
- DCAP Nondiscrimination Test
Tests a DCAP for nondiscrimination
- Practitioner Profit Calculator
Values the hours you spend on research
- IRS Form Finder
Turns a plain-language situation into the right IRS form
- IRS Transcript Analyzer
Decodes four IRS transcript types, line by line
- Kiddie Tax Calculator (Form 8615)
Shows when a child’s investment income is taxed at the parent’s rate
Your own return
- Social Security Benefits Taxability Calculator
Shows how much Social Security is taxable, line by line
- Standard Deduction Calculator
Shows your standard deduction and every step behind it
- Do I Have to File a Tax Return?
Checks whether your income or situation requires a federal return
- Can I Claim Someone as a Dependent?
Checks whether a child or relative counts as your dependent
- Child Tax Credit Calculator
Checks the child tax credit and shows the income phase-out
- Filing Status Calculator
Checks which of the five filing statuses you can use
- Education Credit Calculator
Compares the two education credits for one student
- Math-Error Abatement Clock
Computes the 60-day math-error abatement deadline
80 live notice and letter guides.
TC Codes Library193 live transaction-code guides.
Trump Accounts§530A — contribution limits and distribution rules.
Need help with your specific situation?
This tool gives you the numbers and the citation, but every case has details a calculator can’t weigh. For a second opinion from a tax professional, email Forrest directly. Do not email Social Security numbers, account numbers, or other sensitive information. An email creates no client-practitioner engagement; case-specific advice starts only after both parties have mutually accepted terms and payment has been made.
Email Forrest Baumhover, CFP®, EA →Every tool here provides general information about IRS procedures. Using one is not personalized tax advice, and does not create a practitioner-client relationship with Forrest Baumhover, Fbaum Enterprises LLC, or The Federal Tax Desk. Every situation is different — if real money or a real deadline is on the line, consider having a licensed CPA, EA, or tax attorney review your specific facts before you act.