Error: Field ‘TaxablePeriod’ with value ‘[ENTERED_VALUE]’ data format is not correct

Error message

Validation failed on [FILE_ID]:

Form: SchNolCIT[1] CorpNOLApp[1]/CarryForwardDeductions[1]/TaxablePeriod[1]
Description: Taxable Period for NOL
ReferenceNumber: A13055
Requirement: Base type for a date
Error: The field 'TaxablePeriod' with value '', data format is not correct.

Element Name: TaxablePeriod
XPath: /ReturnState[1]/ReturnDataState[1]/SchNolCIT[1]/CorpNOLApp[1]/CarryForwardDeductions[1]/TaxablePeriod[1]
XML Fragment: 
Field Key: 129,796,128,0,0,0,0,0,0
Error Code: [CODE]
Error Reason: Error parsing '' as date datatype.
The element '{http://www.irs.gov/efile}TaxablePeriod' with value '' failed to parse.

Solution

Go to
Organizer
States
Common State
Basic Return Information
Entity Information tab
Montana row
.
Enter the date in MM/DD/YYYY format in
Date Qualified in State column (I)
.
Do a full recompute, then recreate the e-file.
Go to
Tax Forms
States
Montana
CIT - Corporation Income Tax Return
CIT, Page 13
.
Select
See MT parent Details
.
Enter dates in YYYY-MM-DD format (include the dashes) in columns 6–11.
Do a full recompute, then recreate the e-file.