TO adding new Line is taking too long

[JasonMcD (Jason McDermott)]

Not exactly, but I definitely believe it. TFOrdDtl is my archnemesis.

Process MRP Failing

No kidding, I had a huge issue with TFOrdDtl 11 months ago and now I see what you mean - I am not alone there! So, I have a whole write-up on the site here about this… BUT - I can’t get to it since I am not a “Regular” at the moment. But the solution is to get into SSMS and “force a good plan” from the query store. That was gibberish to me until a walkthrough from a great Epicor consultant (they do exist).