Welcome to the forum Morning_Sky.
First of all I would like to say that u are with the same situation that i faced earlier. I had also update my marital status after submission of application...
. For marital status update CSE is not a good idea since SGVO is not gonna respond u (like my case).
U have to submit below docs/forms:
Forms:
1. Cover Letter stating ur changes
2. Generic App form- Principal applicant
3. Schedule A - Background declaration -spouse
4. Additional Family info- Spouse
5. Supplementary -Travels- Principal applicant
6. Fee payment
7. Doc checklist
Sending ur educational docs as hardcopy---courier it to above address would be most wise.
Hope this will help. Let us know is u need further info/assistance...