Country tag for Iran is:
PER
If you want play for Iran HOI4 you could use tag command:
tag PER
To annex Iran in HOI4 you could use annex command:
annex PER
To delete all Iran units you could use deleteallunits command:
deleteallunits PER
To add interests on Iran you could use add_interest command:
add_interest PER
To remove interests on Iran you could use remove_interest command:
remove_interest PER
To start occupation on Iran you could use occupationpaint command:
occupationpaint PER
More country tags for HOI4 or more cheats for Hearts of Iron IV