Took an IRA QCD. Previously, IRS wrote that I owed more tax. Had to send documentation. After I efile, can I mail supporting information about the QCD with my tax check?

I would like to send documentation about the Qualified Charitable Distribution now instead of waiting a year to hear from the IRS. Twice (a year later) they have said I owed more money. After I sent the documentation, all was ok. I would like a way to send the information now.