AMHA approved tenant signed "as is" lease but refused to move in - how to proceed?

[Jeffrey Richard]

I had an AMHA approved tenant sign an "as is" lease for my rental property. The tenant had already inspected the unit before signing the lease. However, on move-in day, the tenant claimed the unit wasn't clean enough and refused to move in, despite my offer to clean whatever was needed the next morning. The tenant then stopped payment on the security deposit.

1. Should I contact AMHA first to inform them about the situation?
2. Can I pursue legal action to recover rent for the full lease term (12 months) since the tenant signed the lease?