Just a case of the left hand not knowing what the right hand is doing. They close the case because they reproduced the defect using the information you supplied. There will be a fix, but, as you noted, it may not happen before April 18th. If your child is in line for a refund, there is no rush to file. If not, then pay what TurboTax says is owed using the extension form option. When the fix arrives, you then file the actual return(s) but make certain you include the extension payment as already paid.
