SQL Command For Dropping Identity

Hi,

Is there a way to drop a column identity using TSQL?

Also, does this code look correct?

declare @max1 int
declare @max2 int
select @max1 = max(acid) from cms_2a
alter table cms_3a add cwid int identity(@max1, 1) <------ Error
select @max2 = max(cwid) from cms_3a
alter table cms_4a add cwtid int identity(@max2, 1) <------ Error

I do not have identities on tables cms_3a and cms_4a, but I do have an identity on cms_2a.

Thank you!