So sorry for the loss of your mom. It is not clear from what you say about your mother's income whether she could be claimed as your dependent. You say she had SS and a pension, and a retirement account. If her income from the pension and IRA was more than $4700 --- not counting the SS---she cannot be claimed as a dependent. Unless you can claim a qualifying dependent you cannot file as HOH.
IRS interview to help determine who can be claimed:
https://www.irs.gov/help/ita/who-can-i-claim-as-a-dependent
Am I Head of Household?
https://ttlc.intuit.com/questions/1894553-do-i-qualify-for-head-of-household
https://ttlc.intuit.com/questions/2900097-what-is-a-qualifying-person-for-head-of-household
If you qualify as Head of Household, when you enter your marital status (single or married filing separately) into MyInfo, and then enter your qualifying dependent, TurboTax will offer HOH as your filing status.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
