Having pre set fees is suspect as landlords may only deduct from the security deposit costs to repair damages beyond normal wear and tear. I wouldn’t sign anything, they are free to inspect and I’d say that them being there with you for an inspection is to your benefit but do not agree to fees not in your lease or not supported by receipts or quotes etc.

Refer to this site for more information specifically the “Moving Out Section”

https://www.doj.nh.gov/consumer/sourcebook/renting.htm#:~:text=Anything%20that%20you%20pay%20to,receipt%20for%20your%20security%20deposit.