Improved Penalty Administration and Compliance Tax Act

Improved Penalty Administration and Compliance Tax Act - Title I: Document and Information Return Penalties - Amends the Internal Revenue Code to revise penalty provisions in connection with tax return administration. Imposes a uniform penalty of $50 per offense to a maximum of $250,000 per year on any person who fails to: (1) file timely and correct information returns; (2) furnish correct payee statements; or (3) comply with other information reporting requirements. Reduces penalties if corrections are made within a specified time period. Allows exceptions for de minimis failures. Increases penalties and removes the annual penalty ceiling in cases of intentional disregard of filing requirements.

Revises requirements governing regulations prescribed by the Secretary of the Treasury in connection with returns that must be filed on magnetic media or in other machine-readable form.

Directs the Comptroller General to study and report to specified congressional committees concerning: (1) ways to resolve discrepancies between taxpayer identity information shown on information returns and that in Internal Revenue Service (IRS) records; and (2) whether persons in the business of transmitting information returns and other documents to the IRS on behalf of others should be subject to registration.

Title II: Revision of Accuracy-Related Penalties - Replaces current law governing additions to tax and other additional amounts with respect to tax administration violations with provisions that impose a 20 percent penalty in the form of additional tax in connection with underpayments attributable to at least one of the following: (1) negligence or disregard of relevant rules; (2) any substantial understatement of income tax; (3) any substantial valuation overstatement in connection with income tax; (4) any substantial overstatement of pension liabilities; or (5) any substantial estate or gift tax valuation understatement. Increases the penalty to 40 percent in cases of gross valuation misstatements.

Imposes: (1) a 75 percent penalty in the form of additional tax with respect to any underpayment attributable to fraud; and (2) a 50 percent penalty in connection with underpayments of or failure to pay any stamp tax.

Title III: Preparer, Promoter, and Protester Penalties - Revises provisions governing damages assessable for offenses related to Tax Court litigation to: (1) grant the Tax Court discretion in requiring a taxpayer to pay the United States a penalty (current law requires the penalty); (2) increase the amount of the permissible penalty from a $5,000 to a $25,000 maximum; (3) authorize the Tax Court to impose a penalty upon any attorney who unreasonably multiplies the proceedings in question. Authorizes similar sanctions in cases brought before other courts.

Modifies penalty provisions associated with understatements of taxpayer liability by income tax return preparers to: (1) increase penalty amounts; and (2) institute penalties for understatements due to unrealistic positions or reckless or intentional disregard of tax laws.

Increases from $25 to $50 (to an annual maximum of $25,000) the penalty imposed on income tax return preparers who fail to furnish copies to taxpayers, sign returns, or furnish identifying numbers.

Modifies penalties imposed on tax preparers who fail to file correct information returns.

Increases the possible penalty imposed on persons who promote abusive tax shelters.

Broadens the scope of persons subject to penalties for aiding and abetting understatements of tax liability.

Increases from $500 to $1,000 the penalty for filing a frivolous income tax return.

Repeals a provision prohibiting injunctions against any income tax return preparer who files a surety bond.

Requires that regulations governing disclosure or use of information by tax return preparers permit disclosures for quality or peer reviews.

Title IV: Failures to File or Pay - Increases penalties imposed on persons whose failure to file any return is fraudulent or intentional.

Revises penalty provisions in connection with failures to make deposits of taxes, varying the penalty rate as a function of the time involved in the deposit delay.