If your partner is filing their own return, both of you will indicate when entering the 1095-A in your individual returns that you 'shared the policy with someone not on your return' and each will indicate an allocation %.
This could be whatever you agree on, as long as the two total 100% (50/50 or 100/0, for example).
If you file jointly, or you claim your partner as a dependent, you don't need to indicate a 'shared policy' since you're both on the same return.
Here's more info on How to Enter Form 1095-A.
@reynaarroyo1966
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"