Are you both using the Online version? There shouldn't be any problem with using 2 accounts. Your info is still in the cookies and cache. Try clearing those. You need to first sign out of your account. You can use the same email for 5 accounts.
Here's how to start a second return
https://ttlc.intuit.com/questions/1894512-how-do-i-start-another-return-in-turbotax-online
