If you made the withdrawal in 2018, then the administrator was required by law to withhold a minimum of 10% for taxes. If it was an early withdrawal they were required to withhold an additional 10% for the penalty. So just enter the 1099-R exactly as printed and don't be surprised if you owe additional tax on that money since I doubt the 10% tax withholding was enough.
To pay anything you may owe to the IRS, you can do so online at <a rel="nofollow" target="_blank" href="
http://www.irs.gov/payments">http://www.irs.gov/payments</a>.
