Rule ILHeader-500-2 e-file error

IL Return Header (Rule ILHeader-500-2): If IL-Header TaxPeriodEndDate is not between 12/25/21 and 12/25/22, or IL-Header TaxPeriodBeginDt to TaxPeriodEndDt is greater than 53 weeks, you have filed an incorrect schema version.
You'll receive this message if the fiscal year end date entered for Form 1120 Illinois doesn't fall within the dates listed on the diagnostic.

Solution

Per the e-file schema provided by Illinois, the return will need to be filed out of the correct software (locator) version or paper filed.
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