If you sign off on items left to you in a will can you contest the will?

The first step in the probate process is to present the will to the court for allowance and ask the court to appoint the executor. At that point you have a statutory period (that varies from state to state) during which to contest a will for any technical defects you think may exist in the will. If you think the will should be contested then you are questioning the validity of the will on the grounds that there are technical defects that make it invalid under the provisions of state laws that govern the making of wills. If the will is declared to be invalid and there is no other will the property of the decedent will pass as intestate property If the will contest is not successful then the will will be allowed. You cannot disclaim your inheritance until the will has been allowed by the court. Once a will has been allowed a disclaimer can be filed in writing. Your question is difficult to answer because your chronology is off kilter.