Inherited IRA RMD

HELP!

 

I took the correct amount of RMD and imported my 1099-R. It correctly lists "4" (Death), yet I am being charged a penalty of $1,885 for a withdrawal of $1,598????

 

How can I figure out what Turbo Tax has done wrong. I have had this IRA since 2004 and never before have I had an issue with being charged a PENALTY for taking the REQUIRED RMD, calculated by Vanguard, not by ME.

 

This is obviously a mistake but I can't see where I could have made the mistake, so how do I figure out what TTax did wrong?