I can only use the QB Self Employed service on my tablet. The website on my laptop says it cannot find my company at all. How do I log in?

Hi, Nat. That error only appears when the system has not detected any product under the credentials you have entered. 

To fix this, verify that your product is QB Self-Employed and make sure you entered the correct link. Having confirmed the product, make sure you entered your QBSE credentials and not from other QBO products like Sole trader or QBO.  

We can begin with this Sign in to QuickBooks page. Select QuickBooks Self-Employed, then click Continue to sign in.

If you're still encountering the same problem, the best next step is to access Intuit Account Manager via your tablet. The reason for this approach is because you've already signed in into your account in your tablet, and from there you can verify both your actual credentials and product. Check out this article for more details: Access and manage your personal data from your Intuit Account.

If you have any further questions, feel free to comment below.