If you inherit an IRA from your spouse, you can roll the account into your account and treat it as your own.
If you inherit an IRA from someone other than your spouse:
Have the IRA custodian retitle the account as an “Inherited IRA” (including decedent’s name and date of death and your name as beneficiary).
Begin required minimum distributions (based on your life expectancy) in the year following death. Distributions are taxable if traditional IRA, tax free if a Roth IRA.
A charity also named as a beneficiary must take distribution by 9/30 of year following death.
Non-person beneficiaries may require 5 year payout if decedent under age 70.5
The SECURE Act languishing in Congress may change law to 10 year payout.