Just go back to the claim and you can click "Edit" next to the line item. That part's easy, at least. But the bad news...
AirCover is a joke and much worse than the previous system. We had about $6,000 in damages and were very meticulous to gather photos, videos, invoices, and statements from the cleaning and repair crews. And as expected, our request was slashed, but without any kind of reasoning. There were about thirty people staying for 4 days, drunk and smoking the whole time with unsupervised young children, from diaper age to preteens, running around wildly (per the Ring doorbell). One of the most frustrating examples is that for the smoke remediation service, we used the same crew we've used twice in the past, and we had no problem getting reimbursed 100%. This time, the invoice was cut from almost $1,000 to $250, with the only explanation being "That's industry standard." Excuse me, no, it's not. Industry standard in our area is $4,000 for a whole-house service. I've called three times and nobody knows where to refer me. The resolution team member who handled our claim said I didn't need to submit a written notice of dispute (which is what the fine print says to do, by the way), and instead he said I can call and ask to talk to the "concerned department." So I did, and yep, the next person I talked to had no idea what I meant. We've moved to sending a written notice of arbitration. Atrocious service.