The big question, which you haven’t stated here, is whether you are WITHDRAWING from your IRA and putting the money into a regular money market account? Are you doing that? If so, then the entire withdrawal is considered taxable income in the year the money is moved, and you will pay ordinary income taxes on it.
BUT if you are just changing to a different investment INSIDE your IRA — that is moving from a CD to a MM account — then there are no taxes due, as long as the MM account is inside the IRA. Then if you use the MM checks to make a WITHDRAWAL, only that amount will be taxed as ordinary income in the year of the withdrawal.
Make sure you understand what you are doing here!!