Regarding GSTR 1?

kiran suryavanshi (18 Points)

31 August 2017  
Dear Sir/Madam,
1) Should I fill RCM details in GSTR 1.
If yes then where should I shows it.
2) I have sold to URD and I was trying to fill this details in B2B under GSTR 1, but that info wasn't accepted in excel format which is provided by GSTP.
Pls guide me above issues.

Thank you in advance.