@ John P5 asked: "How do you enter accrued interest paid on a 0 Coupon T Bill when it matures? (Form 1099 B not 1099 INT) in TurboTax"
Am I correct in assuming your accrued interest on your 1099-B is reported as "accrued market discount" in Box 1f? If so, here's how it worked for my T-bill:
I entered all the boxes of the 1099-B appropriately including the Box 1f. On the next screen it asked me if there were any unusual things about it and listed about 5 things. In my case, I chose "do not apply", but answer appropriately for your situation. {NOTE: one of the options there is "this accrued market discount was reported on a 1099-INT." I was careful not to choose that since mine was reported on my Form 1099-B.} Then I completed that section. Since I have desktop software, I went into Forms Mode and looked at the Schedule B, and it had indeed transferred the accrued market discount entry to Schedule B, Part I and annotated it as "accrued market interest" (or similar words.)
