under the tax laws the default is to amortize any premium over the life of the security. so that is the amortization not the full bond premium. see
from 1099-INT
Box 11. For a taxable covered security (other than a U.S. Treasury
obligation), shows the amount of premium amortization allocable to
the interest payment(s), unless you notified the payer in writing in
accordance with Regulations section 1.6045-1(n)(5) that you did not
want to amortize bond premium under section 171. If an amount is
reported in this box, see the Instructions for Schedule B (Form 1040)
to determine the net amount of interest includible in income on Form
1040 or 1040-SR with respect to the security. If an amount is not
reported in this box for a taxable covered security acquired at a
premium and the payer is reporting premium amortization, the payer
has reported a net amount of interest in box 1. If the amount in box 11
is greater than the amount of interest paid on the covered security,
see Regulations section 1.171-2(a)(4).
