There are two software to file T1013. One is latest myTaxExpress EFile software (not NetFile software), the other is a program called Form&Access.
myTaxExpress EFile software is licensed per computer, it costs about $13.99 per 10-filing. There is an unlimited license option, which costs $219.64, tax included, for up-to-3 computers. You can follow this link to do T1013 filing.
Form&Access is a new program, it uses network paid/saved points to file T1013. It doesn't limit how many computers you use. The points is recorded under each registered/paid user by his or her email address. It costs about $1.40 per T1013 filing, tax included.