Inherited IRA 1099

My father passed away in 2018.  He received his normal distribution 1099R with block 7, marked.  My mother inherited his investment, and the 1099 R for her says 4 (death) in block 7.  The problem becomes she is NOT dead, but it tries to determine if she owes RMD?  Since everything in TURBO TAX is showing she is the one who died, but did not, do I need to make a substitute 1099R, or will the IRS figure it out, since my father's SS number shows him as deceased?