Email:Your federal tax return was accepted by the IRS. Program on computer says I need to file with turbotax my 1040 to do my extension. What's wrong here?

Turbotax on computer,did taxes, efile, found mistake, doing extension. Got email:Your federal tax return was accepted by the IRS. Done with extension,with turbotax, unable to efile because FILE a return, read my 1040 has not been efile through turbotax, what wrong here?