WASHINGTON » Some taxpayers will take a little longer to file their 2010 returns, but the wait will be worth the time for beneficiaries of a new tax law.

Thanks to a December tax package that was hailed as a forerunner of a bipartisan spirit in government, the Internal Revenue Service needs to reprogram computers for new college tuition breaks, teachers who buy classroom supplies with their own money and Americans who live where there are no state and local income taxes to deduct.

The IRS said yesterday that it will be mid- to late February before it can accept returns that apply for those tax breaks. However, delays will be minimal for taxpayers who already itemize deductions, because they normally have to wait for their financial documents.

"The majority of taxpayers will be able to fill out their tax returns and file them as they normally do," said IRS Commissioner Doug Shulman. "We will do everything we can to minimize the impact of recent tax law changes on other taxpayers. The IRS will work through the holidays and into the new year to get our systems reprogrammed and ensure taxpayers have a smooth tax season."

The IRS will announce a specific date when it can start processing tax returns affected by the changes.

The changes in the law that will cause delays:

» The new line on Schedule A, Itemized deductions, to allow for state and local sales tax deductions. Taxpayers in states with income taxes usually chose that deduction instead. Taxpayers cannot complete Schedule A until this tax break is programmed in IRS computers.

» The new higher-education tuition and fees deduction for parents and students, covering up to $4,000 paid to a post-secondary institution. Many parents and students, however, will instead use existing education credits.

» The new expense deduction for kindergarten-through-grade 12 educators who have out-of-pocket classroom expenses of up to $250.

The new tax law gives benefits ranging from tax cuts for millionaires and the middle class to longer-term help for the jobless.

Without the law, millions of Americans would have been hit with increases starting on New Year’s Day.

The package retains Bush-era tax rates for all taxpayers, including the wealthiest Americans, a provision President Barack Obama and congressional liberals opposed. It also offers 13 months of extended benefits to the unemployed and attempts to stimulate the economy with a Social Security payroll tax cut for all workers.

Meanwhile, a board that reviews IRS operations said examinations of returns increased by 8 percent this year on taxpayers with incomes above $1 million.

Examinations of individuals with incomes below $1 million, small and large corporations, and collections, remained steady from last year.

The rate of returns filed electronically rose slightly to 69 percent, while revenue from enforcement action was up from $48.9 billion in 2009 to $57.6 billion this year.

The IRS Oversight Board, which consists of nine members, was created by Congress under a 1998 law to oversee the agency’s operations.