@sidekickin There is no penalty for late filing if you owe no tax.
You will have to carry back your net operating loss because you did not timely file your Oklahoma return.
Oklahoma says:
An election may be made to forego the carryback period. A written statement of the election must be part of the original timely filed Oklahoma loss year return. However, if you filed your return on time without making the election, you may still make the election on an amended return filed within six months of the due date of the original return (excluding extensions). Attach the election to the amended return. Once made, the election is irrevocable.
2021 Form 511-NR Oklahoma Individual Income Form for Nonresidents and Part-Year Residents Packet & I...
