How do I show my sibling's share of our mother's health insurance premiums (1095-A)?

[neworchid]

I'm responsible for over 50% of our mother's care, she lives with me and my husband, and list her as a dependent.  My sister reimburses me for 50% of most expenses like our mother's health insurance premium (obtained thru the CoveredCA marketplace).  I plugged in the 1095-A amounts on TurboTax exactly as they appeared on the form.  How do I reduce this amount to show I only paid 50% of this?

For the rest of our mother's medical care expenses,  I have reduced them by 50% for the amount I paid.  But with the 1095-A premiums,  how do I show that I only paid 50%?

[VictoriaD75]

When you enter the 1095-A, indicate it is a policy shared with someone who is not on your return. From there, it will ask you to enter allocation percentages. You can enter any allocation agreed upon between the individuals, even 0% & 100%, as long as the total between all of the taxpayers on the policy does not exceed 100%.