While in your return, type “TAA” in the Search box and then select the “Jump to” link. This will take you directly to the Health Coverage Tax Credit section. Overwrite any answers you find here.
If that doesn't work, go to My Account (at the top center-right)->Tools->Delete a form, and then delete "Form 8885-T" (and "-S" if there is one), This credit appears on form 8885 (the T is for Taxpayer).