Question

He said, "I have done my duty."​

Answer 1

Answer:

He said that he has done his duty.

Answer 2

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He said that he had done his duty.

Extra Information ↴

• Inverted commas are removed in the indirect speech.
• Connecting word 'that' is used in the indirect speech.
• Verb of the reported speech is changed according to the form and sense of the sentence.
• Persons of the reported speech are changed.

According to the rules, if the direct speech is in the present perfect tense, then it is usually converted into the past perfect tense in indirect speech.