IL HB5253

Amends the Uniform Penalty and Interest Act to provide relief for certain taxpayers who entered into pre-October 1, 2009 agreements with the Department regarding tax payment obligations.

Exempts compliant taxpayers from increased 200% penalties under the Tax Delinquency Amnesty Act if they met specific conditions: agreement resulted from an audit, taxpayer complied during the 2010 amnesty period, a subsequent audit after November 8, 2010 changed liability, and all taxes are paid within 90 days of the act's effective date.

Applies the exemption to tax liabilities for taxable periods ending after June 30, 2002 and before July 1, 2009, covering penalties related to interest, filing failures, late payments, information return violations, negligence, fraud, and bad checks.

Exempts taxpayers from 200% penalty multipliers that would otherwise apply to those who fail to satisfy tax liabilities during the amnesty period.