After filing my taxes, I realized I forgot to claim some deductions and credits. The deductions and credits don't affect my refund. Should I still use Form 1040X to amend my return and add credits?


Maybe — you might be able to carry over some credits and deductions. It’s important to claim them if the credits or deductions you left off can be carried over to future years. That way, they’re available in the future when you can claim them.

Since you’ve filed your return, use Form 1040X to amend or add credits or additional tax information to your return. Submit Form 1040X to the IRS. Form 1040X will be your new return.

To prepare the Form 1040X, you need both of these:

  • Your original Form 1040
  • A new Form 1040 with both the deduction and credit corrections

Form 1040X will ask for the old and amended calculations, as well as the difference between the two.

You can prepare Form 1040X using the H&R Block online program, but you’ll have to print and mail it. The IRS doesn’t allow you to e-file Form 1040X. To learn more, see

Allow the IRS 16 weeks to process your amended return. You can check the status of your return on the IRS website three weeks after mailing your return.

If you amend your federal return, you might also need to amend your state return. Contact your state tax agency for more information.

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