Assuming all these records are correct. Also it is actually a business trip. How should I calculate my miles? THIS IS NOT A W-2 BUT A 1099 working from home.
Let's say I drive from
Home to point 1 (business purposes)--9 miles
point 1 to point 2 (personal) --3 miles
point 2 to back homes (business or personal?)--8 miles
What miles can I add for the purposes of tax deduction?
Depends if you are a W-2 employee of self-employed. If W2 then nothing.