The following diagnostic is generating:
Per Form 172 instructions, a Form 172 should be attached to Form 1040, 1040SR or Form 1040X to support each net operating loss deduction taken in the return. E-file can support the inclusion of one Form 172 entered for one year's net operating loss deduction in the Prior Year Form 172 section of the Net Operating Loss screen. A separate Form 172 should be manually prepared and attached as a PDF attachment for each of any additional year net operating loss deductions taken in the return.
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