Yes, you are correct regarding long-term capital gains rate for assets held for more than a year. In 2018 a married couple filing jointly pays no capital gains tax if their total taxable income is no more than $77,200. You'll pay 15 percent on capital gains if your income is $77,201 to $479,000. And couples above that income level pay 20 percent. 

As we are still in the very early stages of the 2018 tax filing season many IRS forms are in the process of being updated. Please periodically check our Forms Availability article to confirm when Schedule D and all accompanying forms and worksheets are ready for filing. Until then it is possible that you may come across some outdated figures in the forms. Thank you for asking this very important question for further clarification.