You will need to contact EACH college and ask them what they would like you to do if you use a “will file” status on the Profile. But yes, you will be required to update.
In terms of estimating…do your parents not have any idea what they earned in 2021…which is almost a full year ago? Surely they have the total figures for that year.
If the figures for 2021 are the same as for previous years, it would be OK to use them as your estimate. But you still need to update with accurate 2021 figures.
Also, are you applying ED, EA or some other way where a CSS Profile has a priority deadline?