Missouri Ifta Auto Fill

Why do you not have Missouri or all 50 states for that matter on here to be able to File Ifta in. Why is there only a few? The main Reason i went with this program was that you had Ifta Reporting but it looks like i will need to find a Different Program that can do that part. Hopefully i can find one that does it all, i really like this program but i want one to do it all and not have to pay for two services.