in SC when try to get a no fault divorce - do you have wait the full year to start the process. When can i file the complaint.

If there are temporary issues such as child custody, alimony, debts, etc then you need to file pleadings now so that those issues can be sorted out on a temporary basis.  If there are no issues that need to be resolved on a temporary basis then you need to wait and file when you have been separated for one year.