The CDC has offered guidance for completing a death certificate of a COVID-19 death. You may download it here: https://www.cdc.gov/nchs/data/nvss/vsrg/vsrg03-508.pdf
On April 16, 2020, the CDC hosted a webinar on completing the death certificate for COVID-19 deaths. You may watch a recording here: https://emergency.cdc.gov/coca/calls/2020/callinfo_041620.asp