Marketplace Insurance Tax Credit

I am going to be retiring early and will be getting health insurance through Marketplace. My husband and I prefer to file separately which means I don't qualify for the Marketplace premium tax credit. Is there a significant tax benefit to us filing jointly so I will qualify for the premium tax credit? Or will it work out about the same if I itemize deductions at the end of the year? I won't have much, if any, income during my retirement so I'd like to know which is a better approach. Thanks.

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