;with adj as
(
	select	c.pk,
                amount_paid 	= a.amount_paid	- c.amount,
		tax_paid	= a.tax_paid	- c.tax_value,
		etax_paid	= a.etax_paid	- c.etax_vale
	from	charge_table c
		inner join 
		(
			select	pk,
                                 amount_paid 	= sum(amount_paid),
				tax_paid	= sum(tax_paid),
				etax_paid	= sum(etax_paid)
			from	another_table 
                        group by pk
		) a     on    c.pk = a.pk
)
update	c
set	amount_paid	= c.amount_paid - a.amount_paid,
	tax_paid	= c.tax_paid	- a.tax_paid,
	etax_paid	= c.etax_paid	- a.etax_paid
from	(
		select	*, rn = row_number() over( partition by pk order by amount_paid )
		from	another_table 
	) c
	inner join adj a on c.pk = a.pk
where	c.rn	= 1