I am sorry for your loss.
You can prepare and file your mother's final income tax return with TurboTax, assuming you are her personal representative or are otherwise custodian of the property of her estate.
I would suggest reading through IRS Publication 559 (link below) for more detailed information on filing a final Form 1040 and a Form 1041 for her estate (if necessary).
https://www.irs.gov/publications/p559#en_US_2019_publink100099488
If you find the material confusing or have difficulty comprehending the terminology or requirements, you might want to seek professional tax guidance and/or preparation.
