Hey @Just-Lisa-Now- ... mine was a little different. I had 'split' returns (the dreaded div) and had the __tp and __sp addenddum to the file names. so not MFS, but may have a similar type reaction.
Solved: Return "accepted" that was never transmitted? - Intuit Accountants Community
above is the link to that thread....but if you want to, skip to the last post ( you would be missing some top-level; posting though 😀). and see how they got me past my acks issues.
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