Will I have to keep my bank account open to get tax return if moving out of US?

If you're eligible for a refund, then it will be directly deposited in the checking or savings account. It's best to maintain the U.S account to request direct deposit. In case, you don't wish to maintain the U.S account, then the IRS will mail the check to the address you provided on your tax return.

Your refund should be credited to your account directly. As you are moving out of U.S.A, the IRS will send you the cheque to the address you provided on your tax return.

Do you have a checking account? If yes, then the money will be deposited there.