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                   Joined September 2019
                
               
			  
			  
             
            
             As per the Goods and Services Tax GST Act, if an individual rents out a property to a business entity for commercial purposes, the landlord is required to register for GST if their annual rental income exceeds the threshold limit of Rs. 20 Lakhs.
As per Income Tax, you should declare your Income as Income from business and professional. Not under income from House Property. 
As you are unregistered person in GST, raise Invoice without GST. Just follow the invoice format. Issue to your tenant. 
As a registered person, Tenant(he) makes payment against that invoice. Then, you can give receipt against his payment for Income Tax purposes.
Tax audit limit under 44AB, 2cr.