Why am i not getting the standard credit for my gtandaughter? she was 17 the whole year,did not work, and I provided for her 100 %. I am her legal quardian.

The "standard credit?"  You do not get the child tax credit for a child who is 17; nor do you receive stimulus money for a 17 year old.  Those are for children who are 16 or younger.

If you claimed her as a dependent on your tax return you could get the $500 credit for other dependents which will show up on line 13a of your Form 1040.

https://ttlc.intuit.com/questions/4499708-what-is-the-500-credit-for-other-dependents-family-tax-credit

If you qualified for earned income credit for her it will be on line 18a of your Form 1040.

Look at your 2019 Form 1040 to see the child-related credits you received

PREVIEW 1040

https://ttlc.intuit.com/questions/1901539-how-do-i-preview-my-turbotax-online-return-before-filing

Child Tax Credit line 13a

Credit for Other Dependents line 13a

Earned Income Credit line 18a

Additional Child Tax Credit line 18b

Child and Dependent Care Credit line 18d