This is a regular verb. It follows the conjugation pattern of the verb comer.
Present:
A Ana devolve os livros à biblioteca.
Ana returns her books to the library.
Preterite:
O Miguel devolveu o pedido errado.
Miguel returned the wrong order.
Conditional:
(Eu) devolveria isso, mas perdi o recibo.
I would return it, but I lost the receipt.