more then one company open at same time in quickbook?

Hello Dharmendra, If you would like to have more than one company open at the same time in QB  what you would need to do is open it in a separate browser than the one you have open.

@Dharmendra 

You are using QB Desktop, correct? You need to use QB Desktop Accountant edition to open 2 company files at the same time on the same screen. If you need to open more files at the same time, setup a simple private cloud solution at your premise. Contact us in private for details.