Yes, you might be eligible for the Credit for Other Dependents.
"The maximum credit amount is $500 for each dependent who meets certain conditions. This credit can be claimed for:
The credit begins to phase out when the taxpayer's income is more than $200,000. This phaseout begins for married couples filing a joint tax return at $400,000.
A taxpayer can claim this credit if:
You might also get a credit if you need to pay for 'daycare" for your mother so that you can work or attend school.
Credit for Child and Dependent Care Expenses