I am doing a tax return for a deceased taxpayer.  He receives a railroad retirement benefit.  He passed away in August of 2020.  He did not receive either stimulus check.  I entered 0 for the $1,200.00 one; but, he is not entitled to the second one as he had already passed.  There is no option other than to put in $600 or $0.  Any suggestions?  Am I missing something?  Thank you.