I accidentally claimed my son this year and I was not supossed to so I need to amend that.

[MaxA1]

Before amending make sure that:

• You wait until your return has been accepted (or mailed if paper-filing).
• Use the same Intuit Account you used to file your original return.
• Once you begin your amendment, you'll see your original return. Only make changes to the areas of your return that need amending. The refund calculator will start ‌at $0 and only reflect the changes in the refund or tax due.
• Any changes you make to amend your federal return will automatically be transferred over to your state return.

See the following links on how to amend your tax return:

• How do I amend my federal tax return for this year?
• How do I amend my federal tax return for a prior year?

[xmasbaby0]

If your child's other parent will be claiming the child, alert them asap so they know their e-file will be rejected if they try to e-file claiming the child.   They do NOT have to wait for you to amend.   They can either print, sign and mail their return that claims the child or they can get an IP PIN to try to e-file.

For the other parent:

GET IP pin in order to e-file if your dependent’s SSN was claimed on another return

https://www.irs.gov/newsroom/irs-takes-steps-to-help-prevent-refund-delays-by-accepting-duplicate-de...

https://www.irs.gov/identity-theft-fraud-scams/get-an-identity-protection-pin