In a nutshell, you will be 22% tax on the amount on line 10 of the 2018 form 1040 that is **OVER** $82,500 if filing single, or $165,000 if filing joint.
Since you're filing joint, that means you will pay $8,907 on the first $165,000 of income on line 10, and then $0.22 (twenty two cents) more for each dollar over $165,000. Keep in mind the IRS rounds to the nearest dollar. So if line 10 is $165,003 that means your tax liability will be $8,908 for the year.