After his accession to the throne , Khizr Khan appointed Malik - us - Sharq Tuhfa as his wazir .
Khizr Khan was given the title of Taj - ul - Mulk and Khizr Khan remained in office until 1421 .
After his accession to the throne , Khizr Khan appointed Malik - us - Sharq Tuhfa as his wazir and he was given the title of Taj - ul - Mulk and he remained in office until 1421 .