While someone else cannot be stopped from claiming your child as a dependent, if you qualify, then file your 2020 tax return by mailing it in. It cannot be e-filed since the social security number of the child has already been submitted.
To claim a dependent, the child must meet the same rules as for the Child Tax Credit in place for 2020.
A qualifying child must meet the 2020 Child Tax Credit rules and have a valid social security number.
From the IRS, 2020 Publication 972 (2020) Child Tax Credit and Credit for Other Dependents
Qualifying Child for the CTC
A child qualifies you for the CTC if the child meets all of the following conditions.
- The child is your son, daughter, stepchild, eligible foster child, brother, sister, stepbrother, stepsister, half brother, half sister, or a descendant of any of them (for example, your grandchild, niece, or nephew).
- The child was under age 17 at the end of 2020.
- The child did not provide over half of his or her own support for 2020.
- The child lived with you for more than half of 2020 (see Exceptions to time lived with you , later).
- The child is claimed as a dependent on your return. See Pub. 501 for more information about claiming someone as a dependent.
- The child does not file a joint return for the year (or files it only to claim a refund of withheld income tax or estimated tax paid).
- The child was a U.S. citizen, U.S. national, or U.S. resident alien. For more information, see Pub. 519, U.S. Tax Guide for Aliens. If the child was adopted, see Adopted child , later.
......In addition to being a qualifying child for the CTC (defined earlier), your child must have the required SSN.
The IRS will sort it out as @Hal_Al stated.
When the 2020 tax return is filed, complete the Recovery Rebate Credit section.
To do this in TurboTax, follow these steps:
- Go to the search box and enter stimulus. Click the Jump to link.
- Answer Yes.
- At the next screen, Let's double-check the amount you received, answer No to edit the first-round and second-round amounts.
- If no stimulus amount was received, enter 0. An amount must be entered in each box. When finished, click Continue.
For the most recent IRS updates, see:
Coronavirus Tax Relief and Economic Impact Payments
Recovery Rebate Credit Frequently Asked Questions | Internal Revenue Service
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