Can I claim my 30 year old daughter as a dependent and her college tuition?

[RC Miller]

My 30 yr old daughter & 5 yr old granddaughter live in NM and I live in KS. My daughter goes to college, does not work, I pay the rent (I am on the lease), tuition, $150 a week for utilities.  Can I claim any of this on my taxes? She is on Medicaid and SRS.

[RobertB4444]

You can only claim a 30 year old dependent if they are fully disabled.  You can claim your five year old granddaughter, however, as long as her parents do not claim her.

[Bsch4477]

That depends on 2 factors. 
1.  Do you provide more than half of their support?

https://apps.irs.gov/app/vita/content/globalmedia/teacher/worksheet_for_determining_support_4012.pdf

2.  Does she have more than $4,300 in taxable income?

[RC Miller]

Yes, I support her 100%. She has no income. 

[RobertB4444]

@RC Miller I answered to hastily above.  Your daughter does qualify as your dependent despite being a student and not living in your household. 

Make sure to check with your daughter about advance child tax credit payments she has received which would require her to file a tax return for this year and might interfere with you claiming her or your granddaughter.