IRS website - https://www.irs.gov/retirement-plans/plan-participant-employee/retirement-topics-beneficiary
Inherited from someone other than spouse. If the inherited traditional IRA is from anyone other than a deceased spouse, the beneficiary cannot treat it as his or her own. This means that the beneficiary cannot make any contributions to the IRA or roll over any amounts into or out of the inherited IRA. However, the beneficiary can make a trustee-to-trustee transfer as long as the IRA into which amounts are being moved is set up and maintained in the name of the deceased IRA owner for the benefit of the beneficiary.
Like the original owner, the beneficiary generally will not owe tax on the assets in the IRA until he or she receives distributions from it.
Since there was not a trustee-to-trustee transfer you report the taxable amount received on your tax return.
However, an expert may have a better view on this situation - @dmertz
