I just accepted the nomination.Don’t worry. It happened to me. I accepted the Nomination and I was still able to change my EE profile after accepting it.
By the way, since you are not claiming points for spouse work experience, you could remove it from the Work section. After receiving ITA, you will fill a questionnaire again (like your EE profile questionnaire but with more fields and sections, for you and all dependents). You will need to detail all of your spouse’s employment info in the personal history section (last 10 yrs). If you put her experience in the Work section, you will be ask for the proof of her employment (reference letters). If it is difficile to get her proof as per CIC requirements, you could detail this info only in her personal history section. But if you can get all of her employment proof, go ahead and put it in both sections (work/personal). Rgds.,
Since I have all supporting documents for her, I can keep her job experience in work history as well.
Thanks!