Inherited inherited IRA

My wife's mother died in 2011 at 86 years old - my wife was 56 at the time - and left my wife an IRA as a beneficiary. We have been taking the RMD each year since.  My wife passed away this past October at 65 and I have inherited that IRA from her.  I am currently 71.  Since the original IRA was inherited by my wife prior to the SECURE Act as a non spouse and I inherited it post SECURE act as a Spouse, what will be my RDM requirements going forward?   (I understand the 2020 RMD has been waived by the CARES Act.)   Also, how does turbo tax address this type of situation.