Should i start a new tax window? When I migrated my DT over to OL there were issues with the GST from old years that have been reconciled but not posted.

Hello CTT2,

Taxes are a vital part of your business. I'd be happy to steer you on the right path so you can start tracking your taxes with ease in QuickBooks Online. The program makes it simple to navigate and make changes to your account. 

Based on the transition you've made, you'll notice some differences in your taxes after migrating from QB Desktop to Online. I encourage you to review this article here which explains more about the differences to expect and their reason. Ultimately, the decision is up to you whether to start a new tax window or not. You're more than welcome to check out the resources below that help you get started with your taxes in QB Online:

• Set up and use sales tax in QuickBooks Online
• File your sales tax return and record tax payment in QuickBooks Online

In case you've got additional questions, feel free to reach out in the comments below. I'm here to help you reach your QuickBooks goals.