How to treat Joint Account INT and DIV Income of an unmarried AZ couple who file separately.

The account was setup with both names appearing on the statements and 1099s but the SSN of only one of the owners.

 

My research leads me to believe the owner with the SSN account number must designate the other owner as a nominee.

 

There seems to be a box to check to indicate there is a nominee for part of the income but no way to identify the nominee by SSN and specify the amount shared.

 

An answer was offered by MailynG1 but it assumed we were a MFS couple and  not domestic partners in a state(AZ) that doesn't recognize domestic partnership.

 

I would really like to be able to handle this and file with TurboTax now and in the future.

 

Can you help?  Thank you.