Form H2 - both to sign?

[Daft Doctor]

Hi, we have just been sent an H2 form to forward to the Impots after our apartment was finished in December. The developer has kindly filled in the relevant details about the apartment on the form. Section 2 asks for my name, address and wife's name, but it isn't clear whether she as joint owner needs to sign the form or whether my signature alone will do. Seems a bit trivial, but with french administration being the way it is and there being a 90 day time limit for returning the form, it would be better if we did it right first time! Any advice gratefully received.

[Ladoix]

Generally, anything for the government needs to be signed by both of you.