How to enter 1099-OID payments on a 5 year bond-type investment whose purchase and sale price were the same? How to recover cost of 1099OIDs? Thanks, --- sam

Purchased 5 year bond-type investment though bank 5 years ago, redeemed in 2020. It was  guaranteed so value was the same as the cost.

Entered 1099-OIDs on tax return during the 5 years.

Since the investment didn't increase, how should the OIDs be entered on 2020 return to recover their value, assuming that's possible?

Thanks,

--- sam