3520 filing date and cost basis for depreciation - foreign inherited property

Hello experts have a few questions and looking for guidance. 

Y2023

Mother died leaving her rental property without a registered will 

My siblings agreed to settle the property to me and started the registration process

I started collecting rent in my account.

 

Y2024

Property officially registered in my name..it was a long process overseas. 

 

Question 

1. Is 3520 due the year (2023) when she died or when the property was officially registered to me (2024)

 

2. In 3520 do I report the FMV on her death date or the date when the sibling settlement was registered?  Is this the cost basis for depreciation calculation? 

 

3. I am reporting the rental income in 2023 as I was receiving it in my account even though the official property transfer occurred only in 2024. Is that fine?