Can I fle my stimules tax return after April 15, 2007

Yes. If you have not filed yet you will get your stimulus check a bit later than others, but it will come. I think you meant April 15 2008, not 2007, right?

can i fle my stimules tax return after april 15, 2007

You must file your 2007 tax return to get the stimulus tax rebate. You must have minimum of $3,000 of qualifying income.