Can you sell cover songs of bands without a liscense?

Not without permission. Who you owe rights (royalties) to depends on if it was released by a record label who retains rights to the song or by an independent label where the band/songwriter retains the rights.

That doesn't mean you can't make a profit off of your cover, but you need to share that profit with those who own the rights to the song.

S i have to get permisssion? Or can i just make the covers then send them the royalties?