Where can I add vendors to my service as its not showing up? to offset taxes and get the appropriate amount?

I know how important it is to track your business expenses accurately in QuickBooks Self-Employed (QBSE). I’d be pleased to share more information about adding vendors. 

QBSE is designed primarily for freelancers and independent contractors, thus it doesn’t include extensive vendor management features. However, there are still effective ways to meet your business needs.

As a workaround, you can categorize your expenses by using the notes or description field when logging an expense to include your vendor details. This ensures you have all the necessary information, even without a dedicated vendor field. Here's how you can do that:

1. To get started, go to Transactions.
2. Select Add Transaction.
3. Use the notes field to include vendor information. 
4. Click Save when everything is okay. 

You can also refer to this helpful screenshot:

Another approach is to manually track vendors with a simple spreadsheet in Excel or Google Sheets, then periodically compare it with your QuickBooks data. 

For a comprehensive vendor management, consider upgrading to QuickBooks Online, which offers more robust features. Feel free to access this article for more details: Plans for every kind of business.

I'd like to ensure you manage your vendors and keep your tax calculations accurately. Let me know how everything plays out by leaving a comment. I'll touch base again, or our Community experts will be there to assist. Take care.