Why cant I claim head of household if my brother passed away on june 18th ? irs pub. 501 says if he lived with me for over half the part of the year he was alive ?

What tax year?  If for 2018 and he was not a full time student under the age of 24, did he have gross income of $4,150 or greater (Social Security does not count)?

no income. permanently disabled. 2018

Again ... follow the interview carefully and answer all the questions to get the HOH & dependent exemption.  Also due to the tax law changes you may not see the same benefit to claiming a dependent over the age of 17 ... review the prior year & current year returns to see the differences.

In the program when you answer the questions about the dependent, if you indicate they passed then you are told to indicate they lived with you ALL YEAR ... doing this will get you HOH status ... READ the screens carefully and follow all directions ...