Short answer: No. Premium tax credits apply only to qualified health plans bought through the ACA marketplace, not to employer group plans, off-exchange plans, or catastrophic plans.
Premium tax credits are tied specifically to qualified health plans purchased on the ACA marketplace (HealthCare.gov or a state exchange). They can’t be applied to an employer group plan, a plan bought directly from an insurer off-exchange, or a catastrophic plan, and they aren’t available to anyone who has an affordable, minimum-value offer of employer coverage. If you have job-based coverage available, you generally can’t claim a credit even if you decline it.