I already filed and have been accepted, but i also forgot my spouse's ss and we also file joint. Someone told me to wait till late Feb to ammend it...but Im very unsure.

The 1040X form for 2018 to amend a tax return hasn't been approved yet by IRS. Please, keep checking the following information on how to amend your return; it will be updated once the 2018 form is released:

https://ttlc.intuit.com/replies/3288565