Widowed and need for a new TT Account

I was widowed in 2024 and filed taxes for that year as MFJ. I'm filing single this year, 2025, no minor children. I have done the taxes for a long time but he was still listed as the Primary person.

1. SETTING UP A NEW TT Account:   We used my email and my phone number within that account even though I was the second person listed on the joint return, and his SSN was used as the primary one for filing purposes.  Will having my phone and email on the original TT account make it difficult for me to set up a new account (which I understand is what I need to do in order to have a clean slate?

2.  CARRYOVER LOSSES:   Since I must set up a new account, am I to assume that I will no longer be able to benefit from the carryover losses incurred in the past? 

Thanks for your time.