! overreported tax amounts and the period of
0425 Inst CT-1X (PDF) · 2026-10-03 edition · updated 2026-10-04 · United States
CAUTION limitations on credit or refund for Form CT-1 will
expire within 90 days of the date you file Form CT-1 X. Instead, check the box on line 2. See Is There a Deadline for Filing Form CT-1 X , earlier.
2. Claim Check the box on line 2 to use the claim process if you’re correcting overreported tax amounts only and you’re claiming a refund or abatement for the negative amount (credit) shown on line 26. Don’t check this box if you’re correcting any underreported tax amounts on this form.
You must check the box on line 2 if you have a credit (a negative amount on line 26) and the period of limitations on credit or refund for Form CT-1 will expire within 90 days of the date you file Form CT-1 X. See Is There a Deadline for Filing Form CT-1 X , earlier.
The IRS usually processes claims shortly after they are filed. The IRS will notify you if your claim is denied, accepted as filed, or selected to be examined. See Pub. 556, Examination of Returns, Appeal Rights, and Claims for Refund, for more information.
Unless the IRS corrects Form CT-1 X during processing or you owe other taxes, penalties, or interest, the IRS will refund the amount shown on line 26, plus any interest that applies.
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