For thousands of home buyers who scrambled  to meet the April 30 federal tax-credit deadline for completed contracts,  a new challenge is looming: Can they nail down their mortgage financing  and get to closing before the program terminates?
 
As a result of toughened underwriting  standards, confusing new federal disclosure rules, appraisal regulations  and a long list of other potential obstacles, meeting that deadline  could be harder than expected. In fact, mortgage industry leaders say  some buyers who are seeking the tax credits won't get a cent because  the clock will run out on them.
Under the extended first-time purchaser  and repeat buyer credits -- the former carries an $8,000 maximum amount,  the latter $6,500 -- all deals must close by June 30. This shouldn't  be a problem for buyers who have already submitted their applications  or who apply and are approved in the coming week or two, lenders say.