Where can I get the E train from the 5 or 4 train

Depends where you are going. 4 or 5 to Lexington/51st Street transfer to E

If you are at Atlantic/Barkley try the Manhattan bound "D" train to W4th St transferto the 'E' train

Take the 4 or 5 train to grand central 42nd st and transfer to the 6 train. Take the 6 train one stop to 51 st and there you can get the E train

Inside the Atlantic mall.