I can't file by Netfile due to two errors. The message says that in T3s, Box 52 must not exceed Boxes 52 plus 54 plus 56. It doesn't. It also says that Box 53 must not exceed Boxes 53 plus 55 plus 57. It doesn't. It also says that Box 21 must be the same amount as Box 52 plus Box 53. It is.