There is no employer number on a 1099-R. The state ID number is the payers state tax number and is required if there is state withholding in box 12. If there is a box 12 amount then the state and payers state tax number must be in box 12 for that 1099-R. If no box 12 withholding then leave boxes 12-14 blank.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
