From whom did you inherit it? Please see this answer from MargaretL.
NOTE: The tax treatment of an inherited IRA depends on whether it was inherited from a spouse or a non-spouse.
1. Inherited from a spouse.
If you inherited a traditional IRA from your spouse, there are three choices:
1. You can treat it as your Own IRA by designating yourself as the account owner.
2. Treat is as your own by rolling it over into your IRA, or to the extent it is taxable to a qualified employer plan.
3. Treat yourself as a beneficiary rather than treating the IRA as your own.
You will be considered to have chosen to treat the IRA as your own if you made contributions to the inherited IRA (your above the line deduction) or you do not take the RMD -required minimum distribution for a year as a beneficiary of the IRA.
2. Inherited from a non-spouse.
If you inherited the IRA form a non-spouse, you cannot treat it as your own. It means you cannot make any contribution, you cannot rollover any amounts into or out of the IRA, other than 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 you as beneficiary. You also must begin receiving distributions from the IRA under the rules for distributions that apply to beneficiaries.