After you file

Did you get a 1099R or 1099Div & 1099B?  You don't get a 1099B or Div for IRA accounts.  You just report the 1099R.  You pay tax on the total withdrawal, gains or losses don't matter.  

If you got the 1099B for a regular account (not IRA)  you have to report it.  The IRS doesn't know you only had $1 gain.  If you don't report the sales and your cost they will think the total sale is all gain.