Uneasy about 1099 and a possible audit.

This is the first year me and my husband are filling with a 1099. He started doing doordash and Spark at the very beginning of the year. He also has a job as a dump truck driver during the warmer months so he also gets a w-2.

I kept a daily track of miles used while he was doing doordash and spark and kept track of the total miles driven in the vehicle for the entire year. So I know its as accurate as it's going to get but it seems high and I am worried we will get flagged and our taxes won't get approved. He made about 16k doing deliveries and my mileage estimate is about 18k. It took us a little bit to figure out that most orders were not worth doing if it was more miles than money so I'm assuming that's why the overall mileage is slightly higher than than what we got in income. He usually only accepts things 1$ a mile or more now but was accepting any and all orders for the first few months.

No matter if we put in deductions or not we will get a return because of his other income so I'm not worried about having to pay either way. I just want to know how likely it is that we will get an audit? Will we still get our return? Do I need to undercut the mileage and just put less than what I tracked?