It's unclear what precisely you mean... Do you mean, can you file a tax return? Sure, any American citizen can file a tax return.

Are you looking for a refund? It's impossible to tell whether you're entitled to some sort of refund so far because that kind of information didn't appear in your original post. You might want to add more information for us.

Please stop asking the same question, over and over and over ( did I say over) I have deleted one or two of them and merged the others.

It can take some time, even a day or two for the right expert to come and read and answer you post.

Do you have income, do you pay in federal and state taxes ?

Disability pay MAY or MAY NOT be taxable; it depends on the SOURCE of the disability payments.

If it IS taxable, then, yes, you can file Head of Household.