There are two possibilites to submit samples:

• Through the webform, i.e. one by one. For this you would need to login to SIMS, create a first level record (for instance, person's record), then  - second level record(s) (for instance, sample record(s)) and finally third level records (for instance, aliquots). There are functions like "Create multiple" or "Clone" that should assist submitter in dealing import of groups of samples.
• By using tab-delimited import functionality, i.e. import of spreadsheets containing two levels information (for instance, sample and patient information).