Claiming on security deposit

A guest has admitted damage and I had a $350 security deposit with airbnb. I have 48 hours to report the issue but to start the process I am required to state the cost of the repair.
It is a long weekend and sometimes it takes a few days to get a tradesman to quote.

How do I log the issue under 48 hours without knowing the cost, do I guess?

You can do it online if possible… They are not going to accept a guess. Try to find something, a URL or something… but if you can’t and the guest has admitted to it, you might as well send it through for $350. The case may be open for a few days. Explain to the CSR that it was not possible to get a quote for repairs until Monday.