The amount you gain on some investment, though also a generic term for various required filings such as a tax return.

 

"The return on the Microsoft investment we made many years ago has been immense."

 

"We were fined by the tax department for not filing our quarterly return on time."

 

"This year our company filed for an extension on its annual tax return."

 

"While filing tax returns can be monotonous, for some it's quite a lucrative living."