WASHINGTON -- The wildly successful $3 billion Cash for Clunkers program has generated more than half a million car sales, according to The Associated Press.

Now dealers hope to get paid.

The deadline for car dealers to submit reimbursement paperwork for the federal car incentives ended Tuesday night, a day after the government halted new sales under the program. Dealers received extra time to submit records for the car rebates as the government's Web site set up to handle the program struggled to accommodate dealers' rush to submit last minute claims.