One month from [specific date] , 2 month from [specific date]

[casitasrd]

Hello,
I’m new to this guys. I’m trying to set a month from an specific date, 2 month, 3 month, etc. for instance, if i select sep 6, 2021, i want to show in another column oct 6, 2021, in the following column nov 6, 2021.

I’ve tried using EWOMONTH([date], 0) + DAY([date])
It works the first time, but when i try taking the last column and try writing this same code. It gives me the next month but 2 days before.

Attached is a picture