Do not panic...consult some tax experts ASAP.
How many years has your husband been in the states? If less than 5 years, as far as I know, nonresident alien is regarded as "single" when s/he files tax return.
How many years has your husband been in the states? If less than 5 years, as far as I know, nonresident alien is regarded as "single" when s/he files tax return.