I have 5 kids how many I can claim in my taxes and how much they give for each child

You claim all of your qualifying dependents.   There is no set amount of "refund" per child.

If you are asking about the earned income credit, you can only get EIC for up to 3 children even if you have more children than 3.    The child-related credits are all affected by how much you earned from working.

Your refund is not broken down by how much you "get" for each dependent.  Each dependent gives you a personal exemption of $4050, which lowers the amount of your income that  you are taxed on.  It is not a refund.

There are several child-related credits you *may* get if you have a dependent child.

You might be getting the Child Tax Credit--that is not a refund--it lowers the tax you owe, up to $1000 per child, but if you do not owe tax then you may not get the full amount of CTC.  In some cases, you could qualify for the "Additional Child Tax Credit" which is a refundable credit, and would increase your refund.  If you qualify for this credit, TurboTax calculates and automatically adds it to your refund.

You might be able to claim the child and dependent care credit if you paid someone to take care of your child so you could work. This is not a refundable credit, so it will not be in your refund.  It can lower your taxable income.

You might qualify for Earned Income Credit, which is a refundable credit if you worked and earned income. The EIC is based on the amount you earned.  If you do qualify for EIC, TurboTax automatically calculates the amount and adds it to your refund.

Look at your tax return to see the child-related /dependent credits you received:

Child Tax Credit 1040A  line 35 1040 line 49

Additional Child Tax Credit   1040A  line 43 1040 line 67

Child & Dependent Care Credit  1040A line 31 1040 line 49

Earned Income Credit 1040A line 42a           1040 line 66a

The children you listed as your dependents will appear on line 6c

my income 45,000 I claim spouse and 5 kids. How much I can tax refund

It sounds like you expect to have earned income of $45,000, married filing jointly with five dependents.

Refund cannot be computed since we do not know the following:

• whether these will be qualifying dependents,
• the ages of the dependents,
• your Federal withholding tax amount,
• who (if any) dependent will qualify for the Child Tax Credit,
• whether you report any unearned income.

Review this IRS Publication.  EITC Assistant is in the upper right corner.