Homebuyer Assistance and Improvement Act of 2010

[AI summary unavailable — showing source text] Homebuyer Assistance and Improvement Act of 2010 - Amends the Internal Revenue Code to: (1) extend eligibility for the first-time homebuyer tax credit until September 30, 2010, for taxpayers who entered into a binding contract to purchase a principal residence before May 1, 2010; (2) extend the penalty for tendering a bad check to the Internal Revenue Service to tendering any instrument in payment, by any commercially acceptable means; and (3) authorize the Secretary of the Treasury to disclose prisoner tax return information to state agencies charged with the responsibility for administration of prisons. Amends the Immigration and Nationality Act to extend through FY2015 the authority of the Secretary of Homeland Security (DHS) to collect a fee for the use of the electronic travel authorization system. Amends the Travel Promotion Act of 2009 to extend the implementation of such Act until after the collection of fees for use of the electronic travel authorization system and extend until FY2015 the authority of the Secretary of the Treasury to transfer such fees to the Corporation for Travel Promotion. Provides for compliance of the budgetary effects of this Act with the Statutory P…