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IRS Help tax calculators for 2025-2027

Tools for handling IRS notices, penalties, and filing issues. Decode letters, estimate penalties, and plan payment options with clear next steps.

Tools in IRS Help

Get guidance for IRS notices, deadline tracking, and payment plan decisions.

Audit risk meter (behavioral)

audit risk calculator

Best order to file missing years planner

file back taxes order

Canceled debt taxability calculator

1099-C tax calculator

CP2000 response draft builder

CP2000 response letter

Deadline countdown by situation

IRS deadline countdown

IRS letter/notice decoder

IRS notice decoder

Payment plan fit wizard

IRS payment plan

Penalty + interest estimator

IRS penalty interest calculator

Transcript terms translator

IRS transcript codes

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TaxGuide Pro turns IRS and state tax rules into instant calculators for 2025 and 2026 returns plus 2027 planning, with clear explanations and next steps to avoid penalties and overpaying.

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Federal basics

  • Federal tax refund estimator
  • Tax bracket calculator
  • Filing status chooser
  • Standard vs itemized

Withholding & paychecks

  • W-4 withholding calculator
  • Paycheck take-home calculator
  • Multiple jobs withholding
  • Bonus withholding calculator

Self-employed

  • 1099 tax estimator
  • Self-employment tax calculator
  • Quarterly estimated payments
  • Home office deduction
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