Yes. According to the Indiana Department of Revenue, you are required to file an Indiana state tax return, if your deceased mother's income is more than $2,000 for the taxable year.
I have included a link that provides additional information regarding the preparation of the Indiana tax return: Deceased
Taxpayer
If your mother's income from all sources in 2018 is less than her filing threshold ($13,600), then it is suggested that you should file a federal tax return to close out her filing requirements. You will indicate on the return that she is deceased and provide the date of death. The TurboTax program will ask you to input the information.
Please ensure that you keep a record of her death certificate in the event that the federal or state may ask for it. In addition, if you haven't done so, you should inform the Social Security Administration that your mother is deceased.
