My mom did that too. (Except, I think she said she doesn't qualify but by the time they figure that out, she'll have the money to pay for it.) I heard on the news that Treasury Secretary Snow waited till the last minute too. (Must've been slow for news at the time. Or they thought that was really important.)
Well, you can give them your bank account number on the phone and they can take the money you owe out electronically.
I was away finishing the form, and it is ready to mail tomorrow.
Would have been on time if TOMORROW had been the 15th like I thought.
Where did I misplace a day last week? I thought last Friday was the 7th.
Good luck to your Mom!