Trigger Update Command

Hi
I've created this simple trigger that will insert records into another table when an insert has occurred on another.

table A
table B


CREATE TRIGGER [TG_MYTRIGGER]
ON [dbo].[A]
AFTER INSERT
AS
Begin
INSERT B (date, id)
Select DISTINCT i.date,i.id
from inserted i
End



What i cant figure out is how to insert the date plus one month into table B

so instead of just inserting into the second table the i.date i want the i.date + one month.

Does anyone know how this could be done.

many thanks

Bil