I need to file form 4852 substitute for form 1099R

To use Form 4852 to prepare a substitute Form 1099-R, you go through the Form 1099-R section itself.  Choose to type in the information for the Form 1099-R instead of trying to import it.  Then, check the box showing you need to prepare a substitute Form 1099-R and follow the screen instructions.e instructions on the screen. 

Why do you need to file a substitute Form 1099-R?  Most people who think they need to are incorrect.