Enter or Edit a 1099R under
Federal Taxes on the left side
Wages & Income at the top
Then scroll way down to Retirement Plans and Social Security,
Then IRA, 401(k), Pension Plans (1099R) - click Start or Revisit
If you are filing a Joint return be sure to pick which person it is for.
If you edit or review a 1099R it does not keep your answers from before but resets them to the defaults. Then you have to go through and answer them all again. So be sure to go all the way to the end of the 1099R section. They are right unless you go back.