You can get this data from the MLS or even buy it from list brokers like listsource. 

Our number one source for sold data is the MLS; followed by pulls from public records.  

My name is Brian Blenner and I am currently an Project Engineer for a general contractor out of San Francisco and I recently transferred from Washington DC.

or do you get them personally and then transfer them somehow to the LLC after the flip?

I have a tenant right now that took a little too long looking at one of my units, and someone swooped in during the week she was going to think it through and signed the lease, and wire transferred the money so it would be in the account Monday AM.

That will be done using data from the MLS and/or County records without the appraiser visiting the property.

HI Gloria,- yes 75% of gross - PITIA can be used when no tax returns exist like many have said above, however there are ways to "elect," to use this method of calculation even if  income/expense data is showing on the tax return.

I have an offer on a property I am developing, and I am wondering if there is a way to keep my ultra-low property taxes via Prop 90 (CA prop to transfer basis to replacement home).  

A few years back I made this sweet template which uses raw data and generates a full report through searching, matching, and adding various columns.  

The terms of the agreement state it is transferable if the new buyer signs an acknowledgement of the terms (or something to that effect).