End Tax Uncertainty Act of 2010

End Tax Uncertainty Act of 2010 - Makes permanent: (1) the Economic Growth and Tax Relief Reconciliation Act of 2001; (2) provisions of the Jobs and Growth Tax Relief Reconciliation Act of 2003 that reduce income tax rates on dividend and capital gains income; and (3) the repeal, after December 31, 2010, of the estate, gift, and generation-skipping transfer tax.

Amends the Internal Revenue Code to: (1) provide for annual increases, between 2010 and 2020, in the amount of the alternative minimum tax (AMT) exemption amount for single and married taxpayers; (2) allow a permanent offset against the AMT for certain nonrefundable tax credits; and (3) reduce to 25% the maximum income tax rate for corporations, including personal service corporations.