What is the IRS notice or letter number on the form received from the IRS? On the first page usually preceded by either a CP or LTR.
If the IRS changed, added or deleted tax data on the original tax return then the amount of the Credit for Qualified Retirement Savings Contributions, Form 8880, will change.
The statement "incomplete or missing" is IRS speak for saying they changed the tax return and now the return does not show the correct amounts on a form or schedule.
