Story highlights Bernie Sanders says more details on his tax plans are coming before the Iowa caucuses

Sanders defended the cost of his universal health care proposal Sunday

Washington (CNN) Bernie Sanders says he plans to release more details about his tax plans before the Iowa caucuses on February 1.

The Vermont senator and Democratic presidential contender said Sunday on CNN's "State of the Union" that a full plan on how he'd change taxes to pay for a universal health care plan, free public college tuition and a lofty infrastructure plan are coming soon.

"We have been very specific. We have more to do, and we will be doing that in the very near future," Sanders said.

When CNN's Dana Bash asked if those details would come before the Iowa caucuses, Sanders said: "Yep."

Sanders said he's already detailed how he'd pay for his proposals so far.

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