From within the Cash Receipts option in General Ledger for the desired batch, select the Options menu and then Lock Batch in Web Link.
Note: The Lock Batch in Web Link option only appears for batches created for cash receipts (deposits) entered in Web Link modern experience.
A checkmark will appear in front of the Lock Batch in Web Link option if the batch is locked.
Tip: A cash receipt batch can also be locked by clicking Yes to the prompt asking to lock the batch when first going into the batch.