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                   55062 Points
                   Joined June 2017
                
               
			  
			  
             
            
             as per your query "excess taxable amount & excess tax being paid" means that excess liability being created & paid thereon. so can only adjust by reducing excess reported taxable value by reducing the same in your april gstr 3b.
& if there is no output tax liability in april month then can claim refund for the same by filing RFD 01  "EXCESS PAYMENT OF TAX, IF ANY"  (REFER CIRCULAR 137/07/2020 GST)