possible bug
I have a SEP ira as my only account requiring a distribution. Using the table it should be roughly 4,300. Turbo Tax says it should be 8,614. I do get a civil service retirement annuity monthly for 29,891. On the form for that 1099R there is a box for ROTH or insurance premiums. I put in the amount I contribute for Insurance and maybe Turbo thinks it's for a ROTH. This appear to be a bug. I reported a repeatable bug last year dealing with Kansas taxes on civil service retirement payments that was repeatable and fixed for this year.