Do I have rights to ask them to mail me the deposit to my forwarding address?
Yes, all tenants have rights.
However, your landlord doesn't have to honor your rights.
In the USA rights flow from the government (federal, state, local) to the citizenry.
In California after a tenant vacates the unit, a landlord has 21 days to:
1=Return the tenant's deposit in full,
2=Mail or personally give to the tenant:
3=A written letter explaining why he or she is keeping all or part of the deposit,
4=An itemized list of each of the deductions,
5=Any remaining refund of the tenant's deposit, and
6=Copies of receipts for the charges/deductions, unless repairs cost less than $126 or the tenant waived (gave up) his or her right to get the receipts.
If the repairs cannot be finished within the 21-day period, the landlord can send the tenant a good faith estimate of the cost of repairs.
Then within 14 days of the repairs being done, the landlord must send the tenant the receipts.
I suggest you provide your landlord with a self address, postage paid, priority mail envelope and ask him to mail the deposit to you.
Be polite, calm, and personable when you request the landlord to do this.
He/she could say, no, and then you and he/she will have to slug this out in small claims court.
That means you'd have to return to California for the trial.
The last thing you wish to do is go to court over this.