You should say that you had health insurance.
It does not matter if you pay for it or if your ex-husband pays for it.
Is the policy through the Healthcare Marketplace? If so, you will need to get a copy of the 1095-A for that policy. If it is not through the Healthcare Marketplace (such as through his employer or a private policy), there will be a 1095-B for that, but you do not need to enter that in your tax return.
