Welcome to the Community, laxmom.
Setting up additional users depends on which version of QuickBooks you're using.
If you're using QuickBooks Self-Employed (QBSE) please note that this is designed as a single-user program, which means adding more users is not available.
You might want to consider QuickBooks Online, then add users and assign roles based on your subscription level, with higher-tier plans allowing more users.
Let me know if you have further questions about managing users in QBSE. We're right here to help.