Error code: (139926)
The last four digits identify the line number from the statement that is in error. A financial statement is one or more of Form T776, Form T777, Form T777S, Form T1163, Form T1273, Form T2042, Form T2091, Form T2121, Form T2125 and/or Form TL2.
The "3" before the line number identifies that the entry on this line cannot be negative. The first digit (or first 2 digits if you submitted 10 or more statements and the error is in the 10th, 11th or 12th statement) of the message number identifies the sequence of the financial statement in which the error was detected.