@rodwarrior Since you can't enter more withholding than the gross distribution on a 1099R, Maybe you can add it this way and don't enter the 1099R at all,
Federal Taxes (or Personal for Home & Business)
Deductions and Credits
Then scroll way down to Estimates and Other Taxes Paid
Income Taxes Paid - Click the Start or Update button
Next page scroll down to bottom section Other Income Taxes Paid
Click Start or Update by Withholding not already entered on a W-2 or 1099
