Trying to add my payroll subscription to a new desk top client, typically I see that as an option under add payroll?

Hi there, @stealthaccountin.

You can add your client's QuickBooks Desktop (QBDT) company file to your payroll subscription. You'll want to add them if you're only working on their payroll subscription. 

To add them to your QBDT, you'll want to go to your Employees menu and select Order Payroll or click Enter Payroll Service Key under the Payroll option.

For more details, here are great articles that you can read for reference: 

• Managing payroll subscriptions for multiple companies
• Add an EIN to existing Payroll Subscription

You might also want to check our Help articles page for reference in case you want to learn some tips and tricks on managing your QBDT.

You can always leave a comment below if you have other concerns or questions. The Community is always here to help you with your concern. Take care and have a great day!