Can a return be corrected after it is filed?

[psherrina]

If the box was not checked that someone can be claimed as a dependent how can it be fixed after you file?

[DoninGA]

If the tax return is accepted by the IRS then you will have to amend the tax return to change the dependency status.

You will have to wait for the IRS to either Accept or Reject your filed federal tax return.
If the return is rejected you can make the necessary changes and e-file again.
If the return is accepted you will have to amend your original tax return. An amended return, Form 1040-X, can only be printed and mailed to the IRS if the original tax return was not e-filed. The IRS will take up to 20 weeks or longer to process an amended tax return.

Before starting to amend the tax return, wait for the tax refund to be received or the taxes due to be paid and processed by the IRS.

See this TurboTax support FAQ for amending a tax return - https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-change-correct-return-a...

[Bsch4477]

You have to amend your return if it was accepted but only after your tax liability or refund have been settled. Since an amended return can take 6 months to process, your parents will have to mail their return. If they try to efile with you claimed as a dependent it will be rejected.