Old versionsSee all
TimeValue Software™ TaxInterest™ IRS/state interest and penalty software is the interest and penalty software most widely used by the IRS and accounting firms nationwide.
For 20 years, it has set the standard for ease-of-use and consistency in determining tax interest on federal and state tax underpayments and overpayments. TaxInterest software is the trusted solution for calculating IRS tax penalties.
If you are calculating interest and penalties on uncertain tax positions for FIN 48, preparing an amended return for a client, or checking figures on an IRS notice, TaxInterest software is the answer.
Simplifies individual and corporate calculations
Contains IRS and most state interest calculations with historical rates from 1954 to present. All rates are updated quarterly with new jurisdictions added periodically.
Displays interest and penalty totals instantly
Allows you to easily create custom interest tables for special jurisdictions
Calculates federal penalties such as failure to file, failure to pay, negligence, accuracy related, and fraud
Handles multiple-year deficiencies
Computes large corporate “Hot” interest and GATT interest
Produces FIN 48 interest and penalty calculations