What should I do if social security is paid for a month?

If you apply for social security transfer, it depends on whether there is a return month on the transfer form of the month you transfer. If it is convenient to return to B, just fill out a form, add your proof of payment to A, and apply for a refund from the Social Security Bureau. If this month is not in the A transfer form, go to A for a refund, because you have already paid it in B, and it is a little troublesome to return B from A. You also need to get your payment certificate and passbook ID card in B, and sometimes you need a household registration book.