Generally, you cannot correct a will deed using correction ink or whitener. The testator is the only person legally permitted to make changes to their own will, typically by creating a codicil or rewriting the entire will. While beneficiaries might agree to changes within two years of the testator's death, making alterations directly to the original document can raise suspicion. It's always advisable to rewrite a will if changes are needed and the testator is alive and willing.