How to manage two Apple ID. I one ipad

You can use 2 IDs to sign in different places like iCloud and the App Store/iTunes, but you can't use 2 IDs to sign into the same place. Both can't sign into iCloud at the same time. You can try setting up Family Sharing between the IDs if you want to be able to share purchases made with the IDs.

Family Sharing.         

Family Sharing - Set up.       

One will be the one that makes the iPad yours--at Settings > Apple ID/Name. You can use to the other to sign in at sites requiring an Apple ID/Password using Safari or another browser.