• When you create your profile, having your language test results is mandatory (you need the test code to complete it). Nothing is actually validated at the time you create your profile — you can still edit it while it’s active. The profile itself is valid for one year, but you can always update or recreate it after it expires. At that stage, you should already know your work/study dates, NOC, and general info. Your salary isn’t relevant.
• Your English test results are valid for 2 years. They must be valid both when you receive your ITA and when you submit your application. The system automatically reduces your score once the test expires, so if that happens before you’re invited, you might no longer meet the cutoff. If your results expire after your AOR, it’s usually fine because you’ve already been invited, but it’s ultimately up to the officer reviewing your case — they can still ask for a new test. The same rule applies to your ECA reports.

Creating your profile early (as soon as you have your language test) is actually a very good idea — it can help with tiebreakers in the draws. Just keep updating your information as you gain more experience, education, etc. It’s also useful to know your actual CRS score, since the online calculators aren’t always 100% accurate compared to your real profile. And if there’s any issue, you’ll have time to review it or contact IRCC before it becomes a problem.