Notice code 066 — We didn’t allow the amount claimed as suspended research credit from Form 6765, Credit for Increasin…

We didn’t allow the amount claimed as suspended research credit from Form 6765, Credit for Increasing Research Activities, on your original 1999 or 2000 tax return. The credit may only be claimed on Form 1045, Application for Tentative Refund, or Form 1040X, Amended U.S. Individual Income Tax Return. For additional information, refer to instructions for preparing Form 6765, Credit for Increasing…

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What the IRS language says

We didn’t allow the amount claimed as suspended research credit from Form 6765, Credit for Increasing Research Activities, on your original 1999 or 2000 tax return. The credit may only be claimed on Form 1045, Application for Tentative Refund, or Form 1040X, Amended U.S. Individual Income Tax Return. For additional information, refer to instructions for preparing Form 6765, Credit for Increasing Research Activities.