I'm pretty sure Turbo Tax agrees with the IRS on that. What is your IRS link?
You can file a Joint return the year your spouse died. For the next two years following a husband's or wife's death, the surviving spouse can file as a qualifying widow or widower if they have a qualifying child. That basically lets you continue to use the same tax brackets that apply to married-filing-jointly returns. After the year of death if you don't have a child you file as Single.
See
https://ttlc.intuit.com/community/using-turbotax/help/how-should-i-file-my-return-if-my-spouse-recen...
