My wife & I had a high deduct health plan in 2018—(64yo). We contributed $6,900 to our HSA from my pay. TurboTax only allows $3,000 (Colo). How do I get my full credit?

Colorado tax return will not accept the full $6900 HSA contribution that was deducted for our 2018 contribution. It says that we are limited to $3000. We are both 64 years old. How do we get credit for the full amount that we contributed in 2018?