Your child can be a qualifying relative dependent as long as they earn less than $4000 of taxable income and you provide more than half their support. Your child does not have to actually live with you to be a qualifying relative dependent.
(Most other kinds of qualifying relative dependents must live with you the entire year to qualify. Living in a house you own but not with you does not meet this requirement. And for qualifying child dependent, the residency requirement would also not be met by living in a different house that you owned.)
However, you can't claim her as a dependent if she files a joint tax return with her spouse, unless the two of them owe no income tax and only file a return to claim a refund of withholding. If the husband has income he must file married filing separately. That means they can't file for earned income credit or any other tax benefit that is disallowed for married filing separately.
You say "family." If there are grandchildren, then the grandchildren could also be your qualifying relative dependents, but only if neither parent files a tax return, or owes no tax and only files a return to get a refund of withholding. The income limit here is $10,300 for the husband and your daughter if they are married filing separately. If they file a tax return and owe tax or want to claim any benefits or credits, then they must claim their children and you can't.
