I did my taxes with u last year and every year for many years. But ur program won't accept my sin number for some reason?

Please select everything that is in the SIN box and delete it. Then re-type the SIN, making sure to use only numbers and no special characters or spaces. There should be total of 9 numbers. Ex: 123456789

If you have TurboTax Live Assist & Review, here is how to talk to a Tax Expert: https://turbotax.community.intuit.ca/community/navigating-turbotax/help/i-m-using-turbotax-live-assist-review-how-do-i-talk-to-a-tax-expert/00/873764