Why did I receive a "Notice of Intent to Assess - Information Request"

Hello Community, 

 

I just filed my 2020 state taxes on 5/19/21 and filed for an extension. I used TurboTax Self Employed and should get a return. Though my taxes were accepted on 5/20/21, I received a "Notice of Intent to Assess - Information Request" from the DOR (State DOR) on 5/24/21. Which was very quick to request these extra document, only 2 business days. 

 

I am wondering why the request for the additional documents? I do still need to file for 2019 & 2018, so maybe thats why or was I supposed to include some or all these documents requested when I originally filed. 

 

They are asking for:

* A copy of my social security card

* Information that validate Schedule C income (gross receipts), such as Form 1099(s), bank statements and invoices. 

*Documents to verify expenses. Accepted documents include receipts and canceled checks with paid invoices/statements. 

 

Thanks in advance for any feedback!