Please correct my sentence

[Zoe2008]

We would like to adjust the quantity for CK9902 of DM shipment, this is requires to add 6 pcs from 4000 pcs increased to 4006 pcs, but keep to the original schedule for 15 April. Please also find the order allocation below

[imanuragjain]

I am not a teacher, but here is my suggestion:
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We wish to change the quantity of CK9902 for DM shipment. Add 6 more pcs to make the total 4006 pcs. Please complete the order by original schedule of Apr 15th and find the details of order allocation below.

[susiedqq]

It is not clear WHO is adjusting (increasing) the shipment numbers - the company or the customer?

[Zoe2008]

It is not clear WHO is adjusting (increasing) the shipment numbers - the company or the customer?

Hi Susiedqq,

This is requires from my customer

Regards
Zoe

[Anglika]

We would like to adjust the quantity for CK9902 of DM shipment, this is requires to add 6 pcs from 4000 pcs increased to 4006 pcs, but keep to the original schedule for 15 April. Please also find the order allocation below

Please adjust the quantity for CK9902 of the DM shipment. Another 6 pcs are required, so the total for the order is now 4006 pcs. Please keep to the original schedule for 15 April. The order allocation is given below.

[susiedqq]

Zoe,

This is requires from my customer

This is required by my customer. or The customer requires the change.