Had Marketplace insurance on self 2023, 2024. Got married 2024. Canceled coverage as of marriage. Why is there penalty. Income calc for me alone was legit.

I had same income as in 2023 up to the marriage. Upon marriage I canceled. There is no cause for a penalty. Using her income to change the entire year calculation is fundamentally wrong and the software should be adjusting for that and when/if advance tax payments still continue.