You can use TurboTax to prepare your personal tax return with both your employment and your self-employment income. However, TurboTax can’t do GST/HST Returns.
You can file your GST/HST Return through your My Business Account with the CRA. The login page is here: https://www.canada.ca/en/revenue-agency/services/e-services/e-services-businesses/business-account.h...
The CRA provides Instructions for completing a GST/HST Return on this page: https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/gst-hst-businesses/complete-f...
