kimai2/templates/invoice/renderer/export.csv

1	start_date	start_timestamp	end_date	end_timestamp	duration	username	description	rate	amount	total
2	${entry.begin}	${entry.begin_timestamp}	${entry.end}	${entry.end_timestamp}	${entry.duration}	${entry.user_name}	${entry.description}	${entry.rate}	${entry.amount}	${entry.total}