On my 1099-B from Treasury Direct, I have a couple of long-term covered bonds (a 5 year TIPS and a 2 year T-Note) which matured in 2024, they have "D" for AMD in a column for "applicable check box on Form 8949", but the column for AMD Amount Box 1f has $0.00. Is that intentional and it's really a long term cap gain; or should it be AMD and therefore on Schedule B as ordinary income and I should amend the Box 1f amounts to do this. It's not much ($12 total) but wanted to understand it. The TIPS cost basis is adjusted for OID but not quite matching the proceeds so there is this small amount of gain/income on maturity.
