Can we file 2 tax returns of me and family member with 1 copy of Desktop Premier TT?

I live in CA and my daughter lived in 2 states - NY and IL in 2025. She recently bought a new construction house but still waiting for tenants. We both have sales from stocks + dividends along with our salaries. 

1. Would 1 copy of TurboTax Premier Desktop version be sufficient for both of us? 

2. We have to pay additional for each of the 3 states right? 

2. We have been using Turbo Tax Premier desktop so far. We were suggested not to use Turbo Tax online due to following. Please confirm if you think that's not true and if you suggest switching to online instead. Thank you!

 

Online can technically do rentals, but in practice:

  • It aggressively upsells mid-return

  • Weaker visibility into:

    • Depreciation schedules

    • Basis adjustments

    • Carryforward losses

  • Harder to audit / review forms

  • One return per account

  • Slower for multi-state edge cases

For your dollar amounts, the risk and friction aren’t worth it.